I think Bisping can beat Vitor if he survives the first. He has very good cardio at 185. I personally think Vitor should be at 205. But, his cardio is average at best anyways.
I just don't think Bisping survives many exchanges. Bisping is all about sticking and moving and out working you. Vitor still has fast hands. You can't out-quick, quick too many times without being caught. And we all know Belfort has power.
Bisping needs to drag this fight along and wear him down. And not look to just jab and move the whole first round. That can work vs. a lot of guys at 185, but not Vitor. He needs to clinch and maybe even look for TDs as the fight goes on.