The rougher crinkle coating will just wear to a smooth coating in use, which will in turn wear to bare steel with further use. The crinkle coating they currently use is one of the better coatings I have seen for that type of knife, it takes a lot of wood work to remove even a significant part of it. Check out Swamp Rat's forums for some really well used blades with little to no coating left.
Side friction on knives is in general not a significant part of the total force, this is usually more critically dependent on the force against the very edge and the force necessary to wedge the material apart. There are in general few materials which exert high side frictional forces and those that do, like thick styrofoam insulation are generally not something you would cut with the knives Busse (or most other makers for that matter) offers.
Even with those materials, cross section and sharpness are still more critical. A very sharp, and very rusty olfa blade easily cuts that insulation far easier than a just slightly dull, but very highly polished on the flats olfa blade.
-Cliff