Berto is good but this is the biggest challenge of his career and I really don't doubt Mosley because he has Richardson and look very determined against Marg.
I like Mosley although his career is sometimes like a roller coaster ride, still he maintains a respectable position and sees to it that he still around in this sport. With his last performance on Margo I think he can still prevail a tough test on the younger Berto.
Im a Mosley fan but depending on the odds come fight night i might place my bet on Berto. If he chose to he could maybe outbox Shane but i dont think he has the intelligence to do it.