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Oster French Door vs Mueller 4 Slice Toaster Oven Side-by-Side Comparison

Oster French Door Digital Convection Toaster Oven vs Mueller 4 Slice Toaster Oven. Polar opposites in terms of design but not overall scores.

By , , , and ·Updated

Oster French Door

Mueller 4 Slice

Oster French Door vs Mueller 4 Slice Toaster Oven

Overall Verdict

The Oster French Door Digital Convection Toaster Oven (TSSTTVFDDG) and the Mueller 4 Slice (MT-175) are polar opposites in terms of design. Their overall scores, however, don’t differ as much and do bring up some interesting strengths and weaknesses of each individual.

Looking at the design usability ratings, things aren’t too optimistic for the Mueller. As a small unit, the Mueller lacks the convection system and interior light that the extra large Oster has. The Mueller has precise analog control dials but no digital display showing the exact timer and temperature like the Oster.

The Mueller has a detachable crumb tray that makes cleaning the interior easier. Meanwhile, the Oster has a removable crumb tray and a single-pull french door that looks aesthetically pleasing.

In a surprising turn of event, what closed the gap between the two toaster oven was the Mueller’s higher performance score. Despite its lower power output, the Mueller’s was better at baking pizza and especially toasting bread—our most crucial cooking test.

The Oster was better at roasting whole chicken thanks to its convection system. However, we thought the Oster’s cooking chamber was too large in ratio to its power output and the oven didn’t do much better than the Mueller at baking fries.

Ranking by
OverallScore Performance50% Design25% Usability25% ScoreOverall 50%Performance 25%Design 25%UsabilityOster French DoorMueller 4 Slice6.56.46.76.46.17.05.35.2
Showing: 2/2 Items

Pros & Cons

  • Large capacity
  • Interior lighting available
  • Easy-to-clean stainless steel exterior
  • Sturdy build
  • Air-ventilation holes on all sides
  • Cool-touch door handles
  • Convenient slide-out crumb tray
  • Lightweight and small size
  • Easy-to-clean stainless steel exterior
  • Cool-touch door handle
  • Simple control knobs
  • Stay-on feature
  • Quartz heating elements have safeguards
  • Energy-saving
  • No convection toggle
  • Buttons not reliably responsive
  • Not very budget-friendly
  • No convection fan
  • No internal lighting
  • No safety mechanism for the door

Key Specs

Dimensions
L21.53 x W19.96 x H12.79 inches
L14.96 x W11.61 x H8.86 inches
Weight
16.8 lbs (7.6 kg)
9.0 lbs (4.1 kg)
Control Type
LCD + 15 buttons
3 control knobs
Temperature
150°F - 450°F
150°F - 450°F
Timer
1 minute - 6 hours
1 minute - 30 minutes + stay-on
Cooking Functions
8
4

Where to Buy

Price at publication
$191.53
$64.55

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Analysis and Test Results

Performance

Overall Performance Scoring
6.4
7.0

Toast

6.0
7.5
Oster French Door Toaster Oven Toast Test
From left to right, 24 pieces of toast for three toast levels including lighter, medium, and darker. On the upper row are the top sides, and on the lower row are the bottom sides of the toast.
The best four pieces of toast from the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven. On the left are the top sides, and on the right are the bottom sides of the toast.
On the left are four pieces of toast from the first batch, and on the right are from the second batch. On the upper row are the top sides, and on the lower row are the bottom sides.
Mueller 4 Slice Toaster Oven Toast Test
From left to right, 24 pieces of toast for the top and bottom of three toast levels including lighter, medium, and darker.
The top and bottom of the best four pieces of toast from the stainless steel Mueller MT-175 4-Slice Countertop Toaster Oven.
On the left are the top and bottom of four pieces of toast from the first batch, and on the right are from the second batch.
Function
Toast
Toast
Number of Slices
4
4
Toast Level
4/6
⅓ to Dark
Cooking Time
7m 25s
4m
Second Batch
5m 31s
4m
Convection
No
No

Pizza

6.3
7.6
Oster French Door Toaster Oven Pizza Test
A toaster oven baked 9-inch thick-crust meat pizza with cheese, onions, and green bell peppers on top. The pizza is inside a grooved silver baking pan on a white background.
Two slices of toaster oven baked pizza on top of one another. It’s a 9-inch thick-crust meat pizza with cheese, onions, and green bell peppers on top. The pizza is inside a grooved silver baking pan.
On a white background, two hands break apart a slice of baked pizza using a toaster oven with cheese, meat, and green bell peppers on top.
Mueller 4 Slice Toaster Oven Pizza Test
 Mueller 4 Slice Toaster Oven PizzaA toaster oven baked 9-inch thick-crust meat pizza with cheese, onions, and green bell peppers on top inside a baking pan.
Two slices of oven baked 9-inch thick-crust meat pizza with cheese, onions, and green bell peppers on top of one another.
Two hands break apart a slice of pizza with cheese, meat, onions, and green bell peppers on top baked using a toaster oven.
Function
Turbo Convection
Toast
Temperature
450°F
450°F
Cooking Time
6m
9m
Convection
Yes
No

Whole Roasted Chicken

8.1
7.0
Oster French Door Toaster Whole Roasted Chicken Test
A whole roasted chicken using a toaster oven on a white background. The chicken is belly up on a baking rack with a silver baking pan below.
A whole chicken roasted using a toaster oven on a baking rack with a silver baking pan below. The thermometer displays the same temperature of 181°F from two probes inserted into the right and left thighs of the chicken.
The roasted chicken is carved into ten pieces on a baking rack with a silver baking pan below. There are three pieces of the carcass, two wings, two thighs, two breast pieces, one drumstick, and two fallen leg bones.
Two hands pulling apart a juicy chicken thigh roasted in a toaster oven. In the white background is the rest of the roasted chicken on a baking rack with a silver baking pan below.
Mueller 4 Slice Toaster Oven Whole Roasted Chicken Test
A whole roasted chicken using the Mueller MT-175 Toaster Oven backside up on a silver baking pan on a white background.
A whole roasted chicken using the Mueller MT-175 Toaster Oven belly up on a silver baking pan on a white background.
A tray of whole toaster oven roasted chicken. The thermometer has two probes inside the chicken and displays 185°F and 192°F.
Eight pieces of a carved chicken including two carcass halves, two breasts, two wings, and two thighs on a baking pan.
Two hands pulling apart a roasted chicken thigh. In the white background is the rest of the roasted chicken on a baking pan.
Function
Turbo Convection
Toast
Temperature
350°F
350°F
Cooking Time
1h 10m
1h 20m
Convection
Yes
No

Baked French Fries

4.1
3.6
Oster French Door Toaster Baked French Fries Test
Pieces of baked french fries using a toaster oven inside a silver grooved baking pan on a white background.
A closeup of pieces of baked french fries using a toaster oven inside a silver grooved baking pan.
Pieces of baked french fries using a toaster oven. Eight pieces of broken-up fries are stacked on top of pieces of whole fries inside a silver grooved baking pan.
Mueller 4 Slice Toaster Oven Baked French Fries Test
Mueller 4 Slice Toaster Oven Baked French FriesPieces of baked french fries using the Mueller MT-175 Toaster Oven on a grooved silver baking pan on a white background.
A close-up of pieces of baked french fries using the Mueller MT-175 Toaster Oven on a baking pan on a white background.
Ten pieces of broken-up baked french fries are stacked on top of pieces of whole fries on a grooved silver baking pan.
Function
Turbo Convection
Toast
Temperature
400°F
400°F
Cooking Time
30 m
27 m
Convection
Yes
No

Design

Overall Design Scoring
6.7
5.3

In the Box

Top to bottom and left to right are a blue box, the Oster TSSTTVFDDG Toaster Oven, one baking rack, one baking rack with supports, a user manual, and a silver grooved baking pan on a white background.
A box, the Mueller MT-175 4-Slice Toaster Oven, a recipe booklet, a baking pan, an oven rack, a user manual, and a brochure.

Exterior

8.0
5.0
An closed front of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background. The exterior is 16.75 inches long, 21.53 inches wide, and 12.79 inches high.
An closed front of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background. The exterior is 16.75 inches long, 21.53 inches wide, and 12.79 inches high.
The front and the right sides of a closed Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background. The control panel is in the front. The right side has air ventilation holes.
On a white background, the back and the left sides of a closed stainless steel Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven both have air ventilation holes. The back side has a black buffer.
On a white background, the top and the right sides of a closed stainless steel Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven both have air ventilation holes. The control panel is in the front.
On a white background, the bottom of a closed stainless steel Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven has four base stands and ventilation holes. The control panel is in the front.
A closed front of the stainless steel Mueller MT-175 4-Slice Toaster Oven with exterior measurements on a white background.
A closed front of the stainless steel Mueller MT-175 4-Slice Toaster Oven with exterior measurements on a white background.
Mueller 4 Slice Toaster Oven ExteriorThe front of a closed stainless steel Mueller MT-175 4-Slice Toaster Oven has a control panel and the right has holes.
The back and left sides of the Instant Omni Plus 18L have air ventilation holes. The back has a power cord and two buffers.
The top, front, and right sides of the Black+Decker TO1760SS 4-Slice Natural Convection Toaster Oven on a white background.
On a white background, the bottom of the Mueller MT-175 Toaster Oven has a detachable crumb tray, four stands, and holes.
The detached crumb tray of the stainless steel Black+Decker TO1760SS 4-Slice Countertop Toaster Oven on a white background.
Weight
16.8 lbs (7.6 kg)
9.0 lbs (4.1 kg)
Length
21.5" (54.7 cm)
15.0" (38.0 cm)
Width
20.0" (50.7 cm)
11.6" (29.5 cm)
Height
12.8" (32.5 cm)
8.9" (22.5 cm)
Material
Stainless steel
Stainless steel
Color
Silver
Gray
Door Handle
Cool-touch
Cool-touch
Tray Indicators
No
No
Crumb Tray
Removable
Detachable

Control Panel

The control panel of the Oster TSSTTVFDDG Toaster Oven has an LCD and 15 flat buttons for Toast, Bake, Broil, Turbo Convection, Pizza, Warm, Defrost, Dehydrate, Timer, Temp, Clock, Stop/Cancel, and Start.
The control panel of the Black+Decker TO1760SS 4-Slice Toaster Oven has 3 control knobs for temperature, function, and timer.
Type
LCD + 15 buttons
3 control knobs
Temperature
150°F - 450°F
150°F - 450°F
Timer
1 minute - 6 hours
1 minute - 30 minutes + stay-on
Indicator Light
No
Yes
Status Bar
No
No
Light Toggle
No
No
Convection Toggle
No
No
Rotation Toggle
No
No
Automatic Preheat
Yes
No
Audio Cues
No
No

Cooking Functions

The eight cooking functions of the Oster TSSTTVFDDG Toaster Oven are in the center of the control panel. They include Toast, Bake, Broil, Turbo Convection, Pizza, Warm, Defrost, and Dehydrate. The oven’s right side has air ventilation holes.
The function dial of the Black+Decker TO1760SS 4-Slice Toaster Oven has 3 cooking functions including Bake, Broil, and Toast.

Interior

7.0
1.0
The cooking chamber of the Oster TSSTTVFDDG Toaster Oven has one nichrome heating element on top and two on the bottom, two rack levels, a shining light, and a fan cavity on the right wall.
The cooking chamber of the Oster TSSTTVFDDG Toaster Oven has one nichrome heating element on top and two on the bottom, two rack levels, a shining light, and a fan cavity on the right wall.
The cooking chamber of the Oster TSSTTVFDDG Toaster Oven has one bent nichrome heating element on top and two straight ones on the bottom, two rack levels, a light, and a fan cavity on the right wall.
Two assembled guide rails on the right side of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven’s cooking chamber. A fan cavity is in between the two rails.
Mueller 4 Slice Toaster Oven InteriorThe Mueller MT-175 4-Slice Toaster Oven’s cooking chamber has 2 quartz heating elements with guards and 2 guide rails.
Mueller 4 Slice Toaster Oven InteriorThe Mueller MT-175 4-Slice Toaster Oven’s cooking chamber has 2 quartz heating elements with guards and 2 guide rails.
The Mueller MT-175 Oven has 1 bottom heating element with a guard and 2 guide rails on its right cooking chamber wall.
Heating Elements
3 nichrome
2 quartz
Convection Fan
Yes
No
Lighting
Yes
No
Tray Levels
2
2
Rotisserie
No
No
Safety Hook
No
No

Power Cord

A two-pronged plug power cord. In the background is the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven.
A two-pronged plug power cord. In the background is the stainless steel Mueller MT-175 4-Slice Countertop Toaster Oven.
Length
25.8" (65.5 cm)
30.7" (78.0 cm)
Type
2-prong plug
2-prong plug
Power
1500 W
1100 W
Rated Output
120 V ~ 60 Hz
120 V ~ 60 Hz

Accessories

A stainless steel baking rack with two supports below of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background.
A stainless steel baking rack with two supports below of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background.
A stainless steel baking rack of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background.
A stainless steel baking rack of the Mueller MT-175 4-Slice Countertop Toaster Oven on a white background.
Length
15.7" (39.8 cm)
10.5" (26.7 cm)
Width
16.1" (41.0 cm)
8.8" (22.4 cm)
Height
0.7" (1.8 cm)
0.5" (1.3 cm)
Material
Stainless steel
Stainless steel
Dishwasher Safe
Yes
Yes

Build Quality

6.0
8.0
An opened Oster TSSTTVFDDG XL Digital French Door Toaster Oven on a white background. Inside the cooking chamber, from the bottom up are one removable crumb tray, one baking rack, and one baking pan under another baking rack.
The front of an opened stainless steel Mueller MT-175 4-Slice Countertop Toaster Oven with an oven rack and baking pan.

Capacity

An opened front of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven on a white background. The cooking chamber is 15.75 inches long, 16.53 inches wide, and 10.04 inches high.
An opened front of the stainless steel Mueller MT-175 4-Slice Toaster Oven with interior measurements on a white background.
Length
15.8" (40.0 cm)
10.6" (27.0 cm)
Width
16.5" (42.0 cm)
9.8" (25.0 cm)
Height
10.0" (25.5 cm)
7.5" (19.0 cm)

Usability

Overall Usability Scoring
6.4
5.2

User Control

8.0
6.0

Ease of Use

5.0
4.0

Cleanability

7.5
7.0
A silver baking pan of the Oster TSSTTVFDDG XL Digital French Door Convection Toaster Oven with some stains on it on a white background.
Mueller 4 Slice Toaster Oven CleanabilityPermanent stains on the left cooking chamber’s ceiling and the upper heating element’s guard of the Mueller MT-175 Oven.
Mueller 4 Slice Toaster Oven CleanabilityPermanent stains on the left cooking chamber’s ceiling and the upper heating element’s guard of the Mueller MT-175 Oven.
Permanent stains on the right cooking chamber’s ceiling and the upper heating element’s guard of the Mueller MT-175 Oven.
The cleaned grooved silver baking pan of the stainless steel Mueller MT-175 4-Slice Countertop Toaster Oven.

Behind the Comparison

Headshot of Alan Nguyen
Alan NguyenReviewer

Alan Nguyen is a writer and product reviewer at HealthyKitchen101. His major in English language teaching taught him to present concise information. In addition to his cooking hobby, he values the practical aspects of household appliances.

Headshot of Lap Vo
Lap VoTest Lead

Lap is Head of the Research, Testing, and Review Team (RTR Team) at HealthyKitchen101.com, where he directs and supervises the testing of kitchen gadgets and appliances.

Headshot of Tuyet Pham
Tuyet PhamProfessional Chef

Tuyet Pham is an award-winning Saigonese chef passionate about delicious and healthful foods. At HealthyKitchen101, she develops recipes and collaborates with our Research, Testing, and Review lab to evaluate the performance of cooking appliances. Her assessments add a strong authoritative voice to our product scoring process.

Headshot of Nguyen Ntk
Nguyen NtkVisual Specialist

Nguyen Ntk is a graphic designer, photographer, and videographer whose philosophy centers around respecting and celebrating the beauty of reality. Through his lenses, Nguyen strives to capture the true essence of objects and events, showcasing and highlighting authentic features without distortion or exaggeration.

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