I compared 4 different electric coffee/spice grinders:
– Krups F20342,
– Amazon basics CG9403-GS,
– Rommelbacher EKM-100,
– Bosch TSM6A011W.
I bought It to grind spices, I didn't test grinding coffee.
Build
Rommelsbacher has a brushed RVS finish, which looks nice If that's your thing, where the others have a shiny black plastic finish. But not in a really cheap way. They feel sturdy. Up to your preference. I personally prefer black over silver.
Using It
The "turn on" mechanic of the Krups & Bosch are similar and in my testing the best ones. They have a sliding button to press and turn on, where the other 2 had a press the cap mechanic. The AMZ has a hard time to close easily. It has a "press the cap" mechanic to turn on And because of that turning It on can also be a bit annoying. More on that next.
Isolation
Because of the press the cap design of the AMZ & Rommelbacher, they both had issues where the cap wasn't always properly sealed cause spices to leak and go in places you don't want them, also a waste. Only for this reason I won't even consider these ones.
Internal compartment design
AMZ has a very slick compartment without seams, which makes cleaning easier. It's the best one in that regard. The 3 others all have a bit of bent and a seam when the compartment goes from the plastic to the metal.
Bosch is otherwise the only unique one because the compartment bottom isn't horizontal, but has a diagonal design. I'm sure that's to help the spices to move around more easily.
Capacity
Even though the AMZ supposedly has 30 gr vs the others 70/75 gr It wasn't such a big difference in practice. It was just slightly smaller. It had a level marking that was low. So I assume It's not so much the "space" that's the limitation, but probably more to do with the power of the motor If It's loaded up full.
Grinder
Concept of the grinder are all very similar with the main difference being that all of them have 1 wing up and one wing down, but Bosch has them both down and Krups has them both up.
Performance
The main criteria, how do they grind. Well, they all did the job, but not all as well. Both the AMZ & Rommelbacher had leakage in the wrong places. The Rommelbacher has the most power, but because of the compartment design, the performance really wasn't there. It only makes It the loudest one. It didn't do It better than the Krups. The AMZ got second place, because of It's smaller compartment, spices grinded quicker, but It also leaks, which is really a no-go. The Bosch is by far the best one. The quickest and finest results. The wings pointing down with the angled floor helped to keep the spices moving around better creating a quicker and finer grind.
Pouring
The Krups had the easiest pour thanks to Its very oval design. The Bosch and ROMMELSBACHER have some form of an oval shape to help pouring. Only the AMZ was completely round, which made pouring a horrible experience.
Cleaning
The AMZ has the most smooth compartment design, which makes It very convenient to clean. The Bosch is easy to clean as well because of the angled floor. The others were worse, with the Krups the worst one, because somehow the metal used caused for more stickiness of the spices.
Price
AMZ is with €17,50 by far the cheapest.
Bosch, is with €25 about 50% more expensive, but worth It. Sometimes on sale for +- €20,-.
Rommelbacher, is with €28,50 about 60% more expensive as the AMZ. Not worth It.
Krups,wth €29,95 the most expensive and I have no idea why.
Ranking & conclusion:
1. Bosch
Best performance, smart internal design, classy looking build. No real negatives.
2. Krups
In terms of general experience It's in 2, but with quite some negatives. Primarily of course because the performance for this price-range is sub-par. Took me twice as long to not even get the same result as the Bosch. RVS surface Is a bit more sticky vs the others, which makes cleaning a bit more work. But pouring was he best with the Krups with Its oval design. Design is overall similar to Bosch.
3. AMZ
Price is great, this would normally be my no.2 If It didn't have the leaking problem. That really renders It almost useless for Its intended purpose. And pouring with Its round shape Is a challenge. Eveyrthing else is better vs the Krups.
4. Rommelbacher
Most watts, powerrrr. But I didn't really see the results of It. Only more noise. It leaks easily (not as easily as the AMZ though) and at this price level that's just not good enough. It could be the best one for coffee though because of the extra power and loaded with beans I can see that being beneficial. With the courser bean texture It probably won't leak either. But that's all assumptions, I haven't tested It. Being the only one with brushed RVS It could fit your other equipment better.
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