In a competion level, probably men because they are stronger, but on a street fight...I would have to say girls, not because we are any stronger or faster or smarter (well, smarter yes ) , but because most guys think they are all the above. They would not only be cocky most likely, but since women would be the "Prey", we would be more geared towards survival and would fight cheaply and more dangerously, while a guy would use it at an excuse to look macho.... BTW, I am not talking about everyone...just the majority of guys would act like wannabe tough guys if a girl got in there face.