WOW, that is an interesting question.
For me it depends on how the fight or match is done. I prefer bouts where the women fight or wrestle body to body, breast to breast, and thighs interlocked. It's rare to see an actual catfight where that happens. I see it more often in non-pro style wrestling, especially where the girls try to pin each other with a full body pin. Having said that, I also think it's a turn on to see a very intense catfight, with plenty of hair pulling. Even a stand up, toe to toe fist fight can be quite exciting, because of the intensity of the fight.
So after that convoluted reply, I guess I would prefer a real catfight, very intense, with lots of hair pulling, and ground fighting, bodies pressed together. But then again there's mma and ufc where there is plenty of intensity and body contact, but no hair pulling. Oh, I give up!!