I interrupted these two bucks in a pretty robust sparring match, something I rarely witness in the field. Unfortunately I never saw who was winning.
I'm inclined to believe the stockier one with the grass hanging off it's rack was the dominant, just because he looks fiercer and the grass suggests he's willing to get down and dirty. But the grass could also mean the buck with the tall tines was pinning him down into the dirt and making him eat it.
We'll never know. Perhaps they'll have a rematch.