Because the "B" denotes the presence of a firing pin block, there is no CZ 85 B Combat, just the 85 B or the 85 Combat.
I think the Shadow models do not have firing pin blocks.
CZ Custom has, if I recall correctly, reported that non-B versions of the 75/85 are quite drop safe. I doubt that they would have started modifying guns to remove the FPB if that wasn't true. And, they convinced CZ-UB to make FPBless models.
By removing the slide you can see how the FPB works. Pulling the trigger raises a prong, which moves the cylindrical block in the slide upward, thus unlocking the firing pin. Thus, there is no way a firing pin can ignite a primer unless the trigger is pulled.
I gather that the reason CZ Custom began removing FPBs was to reduce and smooth the trigger pull. Because the trigger on a B pistol does more work than the trigger on an otherwise identical FPBless pistol, I must assume the trigger on the FPBless pistol will be superior and could be refined better. However, I assume that if actions on both pistols were Schmekyized, I doubt I could discern the difference, or if I could, I assume the difference would be negligible, and any minor penalty in performance would be worthwhile paying for the small improvement in safety.
