The burr design and the adjustment design of K-Pro, K-Plus and K-Max grinder are the same, ipso facto, so as the grinding result.

The burr design is the 48mm stainless steel burr.
The External adjustment design of K-series grinders is 90 clicks per rotation, 10 clicks per number and 22 microns per click.
It is considered an overall grinder – K-Pro nor K-Plus nor K-Max grinder and it could brew several methods.

The main difference is K-Plus grinder came with a Magnetic catch-cup (35~40g), which allows you to remove it in a flash.
And the bottom of the catch-cup is changeable to a more espresso-friendly feature to fits the 1Zpresso Coffee Maker Stainless Steel Powder Container and the 51/58mm Baskets.
The design of K-Max grinder is also the Magnetic catch-cup (35~40g), however, it is without the espresso-friendly features.
On the other hand, the capacity of the Classic catch-cup design with K-Pro grinder is 30~35g.

The Cylinder case is pairing with K-Pro and K-Max grinder.
The Travel case is pairing with K-Plus grinder.