BJ Penn VS GSP 2 - Prediction

This being the second time these two guys will step into the octagon to face each other, I feel like I should be able to make a concrete prediction of who will win tonights fight. In my opinion, there is more reason to believe that St. Pierre is the better fighter, but I don't know. The last time they fought, BJ worked him the first 2 rounds, but couldn't deliver where it counted. I think BJ is a jerk and I don't particularly want him to win, but he could very well runaway with this match tonight. I'll stick with GSP, but I am positive it will be a great card tonight, or at least it will be better than the Affliction (boo) fight last week that gave us a 2 minute main event. That won't happen. There will be blood...