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PriorityChef 2-Stage Sharpener vs. Longzon 4-Stage Sharpener Side-by-Side Comparison

Here we test and compare the PriorityChef 2-stage vs. the Longzon 4-stage sharpener. Read to see how they measure up.

PriorityChef 2-Stage Sharpener vs. Longzon 4-Stage Sharpener: When Speed Decides the Verdict


Price at publication
Scissor sharpener
DiamondDiamond, tungsten carbide, ceramic
Grit size
Coarse, FinCoarse, Medium, Fine
L7.9 x W2.4 x H2.6 inchesL9.3 x W1.8 x H3.1 inches


Build Quality
Overall Design Scoring

There’s not much to write home about the Priority Chef’s construction and design. It’s simple and functional, and we love that it has a sturdy working section, a full, flat base, and low center of gravity. 

The biggest shortcoming seems to be the low-quality pad under the base. We’d also prefer something with more grip, though the existing one doesn’t ruin the experience.

The Longzon looks identical to the Mueller handheld sharpener and has a much better build and design than its affordable price suggests. There’s no shoddy parts or gimmicky details — everything fits together securely and seamlessly to serve its purpose.

We also like the device’s substantial size which allows for easy sharpening of larger kitchen knives. The inclusion of the gloves is nice, though we didn’t feel the need to use them.


Slot Arrangement
Pulling Through
Stability on a Clean Surface
Stability on a Wet and Dirty Surface
Overall Usability Scoring

With a straightforward design and slot arrangement, the learning curve is very mild with the Priority Chef. Its low center of gravity and wide, flat base offers good balance and stability. 

However, its narrow slot openings might be a bit challenging to work with. And the stainless steel grip may not be so ideal if your hands are sweaty or oily.

The Longzon is straightforward, and there are visual cues on the device if you’re not sure how to use it at first glance. Its large grip and wide working section make sharpening natural and effortless. Though we think a more modest height would make it safer to use, its stability is well above average.


Sharpening Time to Cut a Lemon
Maximum Sharpness Achieved
Edge Smoothness
 Material Retention
Overall Performance Scoring

The Priority Chef sharpened blades quickly while creating a decent edge and shaving off very little material from our test knife. Our test knife came out as keen as when brand-new. The device is undoubtedly one of the top performers among the ones we’ve tested, and a very well-rounded one.

The Longzon 4-stage knife sharpener creates one of the finest edges we’ve seen with a device of this type. Unfortunately, the edge’s functionality doesn’t match up with its aesthetics. It only became keen after more than 3 minutes of sharpening, and a prolonged sharpening time didn’t get it much further on the sharpness scale either.

Overall Scores

Ease of Use
Overall Scoring

Pros & Cons

  • Modest height, low center of gravity
  • Full, flat base
  • Gimmick-free design
  • Great edge retention
  • Sleek design
  • Substantial, accommodative size
  • Fine, smooth knife edge
  • Inclusion of protective gloves
  • Slot for scissors
  • Cheap base pad
  • Small slot openings
  • Tall base
  • Slow sharpening
  • Ineffective slot layout


The PriorityChef 2-stage and the Longzon 4-stage sharpener have a lot in common, but when it comes to effectiveness, the former has an edge.

Both sharpeners are well-designed with no deal-breaking faults. The PriorityChef has a lower center of gravity, while the Longzon boasts a more substantial body and a separate slot for scissors.

Neither device shaved a noticeable amount of material from the knife edge. You will get a decent edge with either, though the Longzon’s will be finer and smoother. 

Despite having only two sharpening slots, the PriorityChef could sharpen faster and to a higher level of keenness. These are deciding factors when it comes to convenient sharpeners, so the PriorityChef is the obvious choice for us.

Behind the Comparison

Headshot of Anh Ngo
Anh NgoReviewer

Anh Ngo is a writer with 9 years experience at different media outlets, covering from public news and events to product testing and analysis. At HealthyKitchen101, she works across different departments, communicating closely with its network of writers, editors, and health, tech, and search engine experts to provide a meaningful and pleasant reading experience for visitors.

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.

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