OM3 + Nikon Zf: Match Made in Monochrome?

Dedicated dials for black and white must mean the recipes are good, right? Unlike the endless options in color editing, black and white comes down to 6 settings, the OM3 and Zf can change these in camera (all but 2). How do they compare against Fujifilm’s Acros, or the true monochrome output from Leica?  Are these dials just a gimmick?