Berto's wild offensive tactics and speed make it a good, competitive fight early on. Then as the rounds go on Cotto's superior technical ability will show and he'll begin hammering the **** out of Andre Berto. After a brutal battering, Cotto stops Berto with 7 to 9 rounds. That's the way I see it.
Cotto has always been so prone to drama even in some of his best wins, it's hard to be sure but I think it's clear he and Berto are different classes of fighters and Cotto should be the clear favorite.
Cotto still has enough left to beat Berto. Simply put, he's a much better fighter. Berto is a poor-man's Mosley and he hasn't done anything to convince me he can beat a fighter of Cotto's calibre.
One thing I think Cotto will be able to exploit is Berto's fragile chin. He's been dropped and also hurt several times in his career any time he's faced a halfway decent fighter, and he's yet to face a serious banger. Cotto might not have one punch KO power, but he certainly hits a lot harder than any of Berto's previous opponents. That's why I think Cotto can stop him as early as the 7th round.
Fair enough ... he has the potential to be a poor-man's Mosley. Maybe Berto will prove me wrong but I just don't see anything really "special" in him.