Cormier is going to **** The over rated (IMO) Big foot Silva.
Silva might be bigger height wise, but I'd lay money that Cormier has more grappling strength. And while he is a slightly more experienced striker, he isn't really a knock out threat (he nailed glass chin Arlovski with several flush shots and didn't drop him.). Cormier will control where this fight goes and if does go to the ground he will have top position. And while Silva has good top BJJ, his bottom game isn't anything to write home about.