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KOIOS 4-In-1 Immersion vs BELLA 10-Speed Side-by-Side Comparison

Our comparison between the KOIOS 4-in-1 and the BELLA 10-speed focuses on the three criteria that you may want to know about: quality, usability, and efficiency.

By , , and Updated

KOIOS 4-In-1

Bella 10-Speed

KOIOS 4-In-1 Immersion vs BELLA 10-Speed

Overall Verdict

8.0
Overall Score
7.1
Overall Score
  • Performance (50%)7.9
  • Design (20%)7.6
  • Usability (30%)8.3
  • Performance (50%)7.4
  • Design (20%)7.5
  • Usability (30%)6.3

After a series of tests, we found that the KOIOS 4-in-1 offers a better way to make smoothies at home. It’s also a more suitable immersion blender for your puree soup, emulsified sauces, and meringue cookies.

On paper, the BELLA claims to be an all-purpose device, and our real-world experiences have found this to be true. However, we still consider this blender to be a waste of money due to its poorly-built and frustrating usability. When working at the highest speed settings, its motor shook so much we felt our hands would fall off. At some certain points within the test, we couldn’t even fully control it.

And that’s why even when compared to the KOIOS 4-in-1 in terms of price and efficiency, we still prefer the KOIOS 4-in-1.

Pros & Cons

  • The motor doesn’t vibrate as violently as others.
  • Extra attachments are included for a wider range of tasks.
  • It is easy to attach, remove, and clean the blending accessories.
  • The silicone buttons are responsive.
  • Its durability is backed up by a 2-year warranty.
  • We don't have to sacrifice efficiency for a bargain.
  • It features multiple speeds. 
  • Extra attachments are included for greater versatility. 
  • Blending wand is easy to remove and attach.
  • The blade guard can cause damage to the cookware’s surface.
  • The motor rating is 400 watts rather than its advertised rating of 800 watts.
  • Its performance is inconsistent.
  • The control buttons are hard to press.
  • The blade guard can cause damage to cookware surfaces.  
  • The motor vibrates violently, making it very difficult to maneuver the blender.

Key Specs

Dimension
H15.3 x W2.1 inches
H15.2 x W2.3 inches
Weight
3.4 lbs (1.5 kg)
2.0 lbs (0.9 kg)
Number of speeds
13
10
Pulse/Turbo option
Yes
Yes
Min speed
11,500 RPM
14,730 RPM
Max speed
14,480 RPM
16,000 RPM

Where to Buy?

Price at publication
$39.98
$37.09

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Analysis and Test Results

Performance

Overall Performance Scoring
7.9
7.4

Puree Soup

7.5
7.5
Scooping a spoon of pureéd soup made by the KOIOS 800W immersion hand blender from a plastic beaker.
Scooping a spoon of pureéd soup made by the KOIOS 800W immersion hand blender from a plastic beaker.
KOIOS 4-In-1 Immersion Hot Soup
A batch of soup pureéd by the KOIOS 4-in-1 hand blender is checked for smoothness by being drained through a stainless steel mesh strainer.
Scooping a spoon of pureéd soup made by the BELLA hand blender from a plastic beaker standing next to a smartphone displaying the total pureéing time (33 seconds).
Scooping a spoon of pureéd soup made by the BELLA hand blender from a plastic beaker standing next to a smartphone displaying the total pureéing time (33 seconds).
BELLA 10-Speed Soup
A batch of soup pureéd by the BELLA immersion blender is checked for smoothness by being drained through a stainless steel mesh strainer.
Pureeing Time
30 seconds
30 seconds
Result
Slightly Chunky
Chunky
Suction
No
Tightly

Frozen Smoothie

7.8
9.3
A white bowl containing a batch of green smoothie whose parts are scooped with a stainless steel spoon is between the KOIOS’s motor body and a smartphone displaying the total blending time (1 minute and 19 seconds).
A white bowl containing a batch of green smoothie whose parts are scooped with a stainless steel spoon is between the KOIOS’s motor body and a smartphone displaying the total blending time (1 minute and 19 seconds).
KOIOS 4-In-1 Immersion Smoothie
After finishing blending, the green smoothie made by the KOIOS hand blender was spread evenly throughout a white paper to check for solid chunks.
The BELLA 10-Speed Smoothie Testing, from left to right: the BELLA motor body, a batch of green smoothie in a white bowl with parts of it being scooped with a spoon, and a smartphone displaying the total blending time (58 seconds).
The BELLA 10-Speed Smoothie Testing, from left to right: the BELLA motor body, a batch of green smoothie in a white bowl with parts of it being scooped with a spoon, and a smartphone displaying the total blending time (58 seconds).
Bella 10 Speed Smoothe
After finishing blending, the green smoothie was spread evenly throughout a white paper to check for solid chunks.
Blending Time
1 min 20 secs
58 secs
Result
Slightly Coarse
Smooth
Suction
No
Slightly

Mayonnaise

9.8
9.0
A little bit of mayonnaise sticking in the whisk attachment of the KOIOS 4-in-1 hand blender when it is removed from the full batch emulsified in a plastic beaker standing between the motor body and a smartphone displaying the total emulsion time (1 minute and 10 seconds).
A little bit of mayonnaise sticking in the whisk attachment of the KOIOS 4-in-1 hand blender when it is removed from the full batch emulsified in a plastic beaker standing between the motor body and a smartphone displaying the total emulsion time (1 minute and 10 seconds).
KOIOS 4-In-1 Immersion Mayonnaise
A little bit of mayonnaise sticking in the whisk attachment of the BELLA hand blender when it is removed from the full batch emulsified in a plastic beaker standing between the BELLA motor body and a smartphone displaying the total emulsion time (1 minute and 24 seconds).
A little bit of mayonnaise sticking in the whisk attachment of the BELLA hand blender when it is removed from the full batch emulsified in a plastic beaker standing between the BELLA motor body and a smartphone displaying the total emulsion time (1 minute and 24 seconds).
BELLA 10-Speed Mayonnaise
Emulsifying Time
1 min 10 secs
1 min 25 secs
Result
Velvety
Smooth
Suction
No
Yes

Almond Milk

7.5
6.0
The KOIOS’s motor body, a plastic beaker containing almond milk, a white plate of almond pulp, and a small red note displaying the total grinding time (1 minute 30 seconds) being side by side.
The KOIOS’s motor body, a plastic beaker containing almond milk, a white plate of almond pulp, and a small red note displaying the total grinding time (1 minute 30 seconds) being side by side.
KOIOS 4-In-1 Immersion Almond Milk
Grinding Time
1 min 10 secs
1 min 15 secs
Result
Fine
Coarse
Suction
No
Tightly

Whipped Egg Whites

7.0
6.0
The 24-oz plastic beaker containing testing beaten egg-white of the KOIOS 4-in-1 immersion blender is put upside down on the gray table with its motor body and a smartphone displaying the total whipping time (2 minutes and 41 seconds) by its sides.
The 24-oz plastic beaker containing testing beaten egg-white of the KOIOS 4-in-1 immersion blender is put upside down on the gray table with its motor body and a smartphone displaying the total whipping time (2 minutes and 41 seconds) by its sides.
KOIOS 4-In-1 Immersion Whipped Egg-Whites
The 24-oz plastic beaker containing testing beaten egg-white is put upside down on the gray table with a BELLA motor body and a smartphone displaying the total whipping time (3 minutes) by its sides.
The 24-oz plastic beaker containing testing beaten egg-white is put upside down on the gray table with a BELLA motor body and a smartphone displaying the total whipping time (3 minutes) by its sides.
BELLA 10-Speed Whipped Egg-Whites
Beating Time
2 min 40 secs
3 minutes
Result
Stiff
Stiff
Suction
No
No

Design

Overall Design Scoring
7.6
7.5

In The Box

The KOIOS 4-in-1 Stick Blender is shipped with a paper carton box, an immersion blending wand, a motor body, a plastic beaker, a whisk attachment, a food processor, and a user manual.
The BELLA Stick Blender is shipped with a paper carton box, an immersion blending wand, a motor body, a plastic beaker, a whisk attachment, a food processor, and a user manual.

Dimensions

The KOIOS 4-in Immersion Blender stands on top of its blending shaft on a gray table, with the length of the blending shaft being noted to the side as 7.9 inches, and the total length of the unit as 15.3 inches.
The BELLA Immersion Blender standing on top of its blending shaft on a gray table, with the length of the blending shaft being noted to the side as 8.3 inches, and the total length of the unit as 15.2 inches.
Height
15.3" (38.9 cm)
15.2" (38.6 cm)
Width
2.1" (5.3 cm)
2.3" (5.8 cm)
Weight
3.4 lbs (1.5 kg)
2.0 lbs (0.9 kg)
Shaft Length
7.9" (20.1 cm)
8.3" (21.1 cm)

Build Quality

7.5
7.0
The whisk attachment, motor body, and blending shaft of the KOIOS 4-in-1 hand-held blender lying flat on a gray table.
The whisk attachment, motor body, and blending shaft of the BELLA stick blender lie flat on a gray table.

Blades

7.0
7.5
The blending wand of the KOIOS 4-in-1 hand blender lying flat on a gray table.
A close-up of the BELLA’s blending wand with 4 sharp stainless steel prongs.
A close-up of the BELLA’s blending wand with 4 sharp stainless steel prongs.
A close-up of the BELLA’s blending wand with 4 sharp stainless steel prongs from the side-viewing angle.
Material
Stainless steel
Stainless steel
Type
Sharp Blade
Sharp Blade
Guard Material
Stainless steel
Stainless steel
Blade Count
2
4
Removable
Yes
Yes
Dishwasher Safe
Yes
Yes

Power Cord

10
10
The KOIOS 4-in-1 Immersion Blender on a gray table with its power cord rolled up next to it.
The BELLA 10-Speed Immersion Blender on a gray table with its power cord rolled up next to it.
Cord Length
5.6 ft (1.7 m)
5.1 ft (1.6 m)
Type
2-prong plug
2-prong plug
Detachable
No
No

Speed And Controls

A close-up of the Power button and the TURBO button of the KOIOS 4-in-1.
A close-up of the Power button and the TURBO button of the KOIOS 4-in-1.
A close-up of 12 speed settings on the top of the KOIOS’s motor body.
A close-up of the two speed control buttons of the BELLA immersion blender.
Activation
Press-button & speed dial
Press-button & speed dial
Min Speed
11,500 RPM
14,730 RPM
Max Speed
14,480 RPM
16,000 RPM
Presets
No
No
Noise Level
90 dB
84 dB
Digital Display
No
No
Pulse Mode
Yes
Yes

Accessories

The KOIOS 4-in-1 Immersion Blender Whisk Attachment lying flat on a gray table.
A whisk attachment of the BELLA hand-held blender lying flat on a gray table.
Material
Stainless steel
Stainless steel
Dishwasher Safe
Yes
Yes
Removable
Yes
Yes

Main Jar

10
10
An included plastic beaker of the KOIOS 4-in-1 hand blender standing on a gray table.
A 30-oz plastic beaker of the BELLA Immersion Blending standing on a gray table.
Material
Plastic
Plastic
Capacity
20 oz
30 oz
Measurements
Yes
Yes
Weight
0.22 lb
0.29 lb
Height
6.7" (17.0 cm)
7.2" (18.3 cm)
Dishwasher Safe
Yes
Yes

Usability

Overall Usability Scoring
8.3
6.3

Blade Assembly

8.5
7.5
The KOIOS Blade Assembly

Handling

8.0
6.0
Someone uses two hands to control the KOIOIS immersion blender: one for holding the handle and pressing the power button at the same time, the other for rotating the speed dial.
Someone uses two hands to control the BELLA immersion blender: one for holding the handle and pressing the power button at the same time, the other for rotating the speed dial.

Cleanability

8.5
7.5

Easeof Use

8.3
6.0

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Behind the Comparison

Headshot of Tina Pham
Tina PhamReviewer

Tina Pham is a staff writer and reviewer, with five years of experience in the industry. As a passionate amateur home cook, she loves to discover practical cooking solutions, and has made it her mission to bring her findings to every kitchen. Her ultimate goal is making cooking more of a pleasure for all.

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.

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