Fluff mattering, and I don't even know what the hell that means since setting....tends to matter, and fluff being mechanics are not the same thing.
Been a long time also since I read a CWoD book but I want to say the stuff for chainsaws,etc was option as a attack X does massive bodily harm. Beyond that, it's a bit of a straw man to say there are spotty mechanics ergo..... If you want an official response you'd have to post on the CWoD forums at the white wolf forums and see if I can't get a former writer or developer to give an answer. If you want to house rule that, then house rule it to your heart's content as per RAW SotA would soak damage from Protean claws.