This is difficult, because I dont think that the psychology of us goes that deep, I think we are very simple and superficial if we want to win. We dont really think about how or against who we are winning, we just want to win and to feel like we are invincible. It makes a difference, but just a little. (my opinion I can't really prove it)
Probably thats why you cant explain this deep psychology, because most of the time our thoughts dont go that deep ;)