Yes, i know that Vitor was a long time grappler but i've seen him fight since losing to Couture and he wasn't impressive as a grappler. Yes he won, but against opponents that weren't really that great.
Randy also has years of grappling as he has competed at the collegiate/olympic level in wrestling. There was a time when BJJ fighter beat all comers, but that time has long past. Wrestlers have more than proved that they can keep up with the best BJJ fighters.
Tito is really no match for randy. If they were to fight again, i believe that the result would be the same. From their last fight, it was clear that randy dominated the ground and pound, and was much stronger that Tito. Tito has never fought anyone at randy's caliber. The last time he fought someone at this caliber, he lost (to Frank Shamrock). Tito has alot of potential, but he has not been tested like randy has. For Tito to beat Randy, he will have to step up his grappling (he only has high school level wrestling experience) and punching skills. Randy can take and give a punch (remember Couture Vs. Rizzo fight). C'mon Tito's toughest opponent was supposed to be Liddell, Randy spanked his with one hand tied behind his back And then spanked Tito a few months later. I don't think there's anyone in the light-heavies that can beat Randy, not even Frank.