It changes things, sure, but I think the person best able to adapt and take advantage of those differences would be the better overall fighter, not the person who has practiced more eye gouges or groin kicks. Against a more skilled opponent your attempts to groin kick or break a finger or whatever will most likely lead you to be knocked out or otherwise submitted just like your attempts to choke or side kick would under MMA rules. Being in a position to make those attacks generally implies that your opponent is either less skilled or is deliberately leaving those openings because they know the rules, and could avoid doing so if the rules were different or there weren’t any rules... because ultimately they’re the one in control if they’re a lot better than you at the core skills of fighting.
That said, given two otherwise equally skilled fighters, of course the one with more experience under the specific conditions would have an advantage.
That said, given two otherwise equally skilled fighters, of course the one with more experience under the specific conditions would have an advantage.