Fun facts about both fighters since their arrival in the UFC....
Chael: 5-2 - Both losses by submission.
Silva: 9 wins by KO/TKO. 3 wins by Submission.
Chael: 0 wins by KO/TKO. 1 win by Submission.
Did Chael dominate Silva in the first fight? Yes.
Did Chael win? No.
Has Silva been preparing for the take down? Yes.
Sonnen gave it all he had in the first fight and Silva still tapped him out. Other than the mistake that allowed him to be tapped out, he can't improve on anything he did against Silva. Silva can improve lots of things and being that he's 14-0 in the UFC, you can bet your bottom dollar that he will.