I really only played around with it for a week. I had the Cimbali Jr., Mazzer Major and Wega 6.8 and I was rotating through the grinders making shots on the Conti Prestina. I wanted to see if there was a difference because otherwise there was no reason for me to spend what I did on that grinder and I planned on returning it. So, I invited some friends over and proceeded to pull multiple shots for everyone rotating grinders as I pulled shots. We could have all been hallucinating, but as a group everyone agreed the shots from the Wega had less bite to them(FYI I did not tell anyone what I thought the grinder would do to the coffee beforehand either). The blend I was using at the time had a very strong acidic characteristic to it and it just seemed a lot more mellow in the 6.8. The flavors were still there, but just not as sharp. I guess you could contribute that to the conical burrs, to the super low RPM of the Compak K10 and Wega 6.8 or both. It is my understanding that lower RPM has less of a negative impact on the beans and in order for burrs to grab beans at an RPM of 300-400 you need conical burrs. Otherwise, with flats, the beans just jump all over and not a whole lot ends up getting ground. This is why when you see a 300-450 RPM grinder they always have conical burrs, i.e. Compak K10, Wega 6.8, Mazzer Kony, Macap MXP, etc.
The RPM on a Cimbali Jr and Mazzer Major are in the neighborhood of 1400, while the Compak K10 and Wega 6.8 are right around 325. An RPM difference of 1000 is huge. In order to reliably run these grinders at such low RPMs they need more powerful motors and that reflects in the price. A great example of this is the Ceado E10 grinder. They have flat 83mm burrs, run at 690 RPM, have a 740 watt, or .99 HP, and retail on them is $1,299. As compared to a Mazzer Major which runs at 1400 RPM and retails for $1,000
Obviously it was not a very scientific experiment, but it was a big enough difference to make me keep it
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