The winner is most often the person more inclined to inflict damage on the other combatant. The idea that you are worried about hitting and being hit means you are still operating in some sort of a rules-based sphere. This is why martial-arts isn't really taught to soldiers beyond a few "look how you can do this" training sessions.
The ultimate combatant is the person that sees the weapon within arms reach that will end the fight - permanently. Most people never achieve this level of death dealing, because it's a really, really abnormal way to operate.
