Berto is young and fast but mosley is a veteran, fast and a lot more savvy. I never thought mosley was that good at 154, but he has really impressed me at 147. Berto is a good up and coming fighter and I think he could be a contender in the future, but I think Mosley will take the guy to school. Mosley has been in there with the best of them and Berto isnt ready for what he brings to the table quite yet.