Both are in the HOF, and neither really deserve to be in the HOF. Both were pressure fighters. Barry was without question more talented, but Mancini I would say was tougher. Who was better?
LOL. They tend to be matched in fantasy H2H's with better fighters. I like Mancini more, but my objective answer is McGugian. I think mid-80s McGugian peaked higher than early-80s Mancini did.