If I totally wash any knowledge of these people from my brain and judge by what I see, I'd say Taeyang won this one. His movements are a lot more fluid and he doesn't force it. 2PM seems a bit too focused on the moves and don't seem natural, while Taeyang kind of just seems to go where his body takes him and you can tell he enjoys it so much. I think it might be more of a raw talent vs learned talent type thing. Also, 2PM could have been nervous or something since it was a battle.