St. Pierre vs. Anderson Silva who would win?

This is a great question. Both are superior in stand up while St. Pierre may be a little more rounded on the ground though. Height isn't something you can just take off though. A fighters reach is key to how they fight. I am not going to say a longer reach will win you a fight, but it will change how you fight. If they were the same wieght however, I think that St. Pierre would have a bit more of a cardio advantage. Overall, I couldn't tell you. It would be the battle of the century.