Well I mostly go off memory for 32X titles since I haven't had mine hooked up in years (too messy). I always remember thinking the 32X version of MK2 was the best. I'll take your word for it though!
AI is not a valid argument when it comes to Mortal Kombat though. Not that I've played them all but I can't think of an MK game where the "leg sweep of cpu doom" doesn't work. :P