Yeah but neither can Williams - well, he can, but he almost always refused to commit to them. But yeah, this is a question that's impossible to answer until we see how Williams looks whenever he returns (assuming it's not a rematch with Andy Kolle or anything on that level)
now that williams has been leveled i expect he may attempt to go back to his less exciting style from earlier in his career where he actually used his physical advantages.
I think Cotto is compact enough to roll in under most of that stuff and get off some good work to the body.