To me, as much as I hate to say it, Bisping was the better fighter that night. I don't know if Sonnen had issues cutting etc, or whether Bissy is a better fighter than I thought.
Regardless, I feel that the UFC is seeing a Sonnen/Silva rematch as a better seller as a Bisping/Silva fight, albeit the latter would be great for the fan base in England.
That being said, I feel the judges/UFC steered the fight to Sonnen. Makes you wonder if Dana or the like whispers into the judges' ears regarding what they should do if the fight is close and comes down to decision.