Amesser A-65 3-Stage vs. Mueller 4-Stage Sharpener Side-by-Side Comparison
Despite sharing similar overall ratings, the Amesser A-65 3-stage and Mueller 4-stage sharpeners actually performed quite differently in our tests.

Specifications
Design
While the Amesser A-65 isn’t among our best performing sharpeners, it’s certainly one of the best built. The unit feels solid and sturdy from start to finish. The parts fit well together and the grip is only half a point shy of the perfect mark.
Despite its affordable price, the Muller 4-stage sharpener has a strong, solid build, substantial abrasives, and tightly-fitting parts. It has a nice fit and finish and a spacious grip that’s comfortable to the touch. However, a lower working section would offer better control and stability.
Usability
The Amesser A-65 is straightforward to use since it doesn’t have any quirky features to be wary of. With the sharpening order progressing in a natural flow, you should have no trouble following the steps. And while the result didn’t turn out particularly well for the slippery countertop test, it represented more of a slight drawback that many people could see coming rather than a serious dealbreaker.
Though the Mueller is a bit tall, it offers decent balance and stability. Its large size and substantial abrasives give you a lot of confidence when sharpening. The slot layout could be improved, in our opinion, but it doesn’t pose much of a problem in terms of usability.
Performance
The Amesser A-65 will certainly make a dull edge keener, though admittedly not to a remarkable level, and leave a nice, smooth edge. On the other hand, it does shear off more metal from the blade than you would expect given the achieved sharpness.
It won’t make your knife razor-sharp, but the Mueller takes little time getting a dull edge ready for common cutting tasks in the kitchen. Contrary to its twin, the Longzon, however, it eats away the blade and leaves a rough, uneven edge.
Overall Scores
Pros & Cons
- Affordable
- Instinctive and easy to use
- Well-built with a solid design
- Grippy and comfortable handle
- Safety glove included
- Strong construction, pretty coloring
- Quick sharpening
- Scissor slot
- Ease of use
- Tapered base
- High center of gravity
- High center of gravity
- Harsh on the knife edge
Conclusion
While the discrepancy in their overall ratings is negligible, the Amesser A-65 and the Mueller 4-stage sharpeners don’t share similar scores in every category.
In speed, for example, the latter has the upper hand. It took much less time to sharpen a knife to a serviceable level. Not only that, but the Mueller could bring the knife to a higher level of keenness compared to the Amesser, when given the same amount of sharpening time.
The Amesser, on the other hand, didn’t shave as much steel off the knife’s edge as its Mueller counterpart did. We also ended up with a more refined edge compared to that produced by the Mueller.
Behind the Comparison
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.
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.