People are vastly underrating Bisping (as always) and overrating Vitor. This fight is a pick 'em... if it wasn't in Brazil, Bisping would be a favorite. He's a better wrestler and striker, he has much better cardio, and Vitor probably won't threaten him off his back.
Vitor is faster and could definitely swarm and finish him, but don't be surprised if he gets tooled for 25 minutes.
Vitor is definetly the better wrestler. very strong in the clinch too. i doubt Bisping could takedown Chuck.