I vote Adidas.
Although I have a pair of the Nike free runners that I really like, the prices are insane. Nike SB shoes are apparently the best skate shoes, I think it's all mental, but really Nike $95 for some skate shoes that last a month if you skate them everyday?
Besides the price, there's also the undeniable fact that Nike uses sweatshops all over the world to produce their shoes for almost nothing. Then they turn around and sell them for huge profit at children's expense. I haven't done any research on Adidas, who knows maybe they use sweatshops too.