Holmes bloated post tyson career showed his lack of world class power....he had enough to keep mercer,McCall and holy somewhat wary but it was his skills that kept them wary. His lack of dig was very apparent in his fight vs a journeyman maurice harris...a fight i felt he lost..
I'd say Holmes had good power. It seems to me that he hit somewhat harder than Ali. For instance, I would think that Holmes would floor say Floyd Patterson, but probably late. Also, it seems to me that Holyfield hit harder than Ali even when controlling for timing and accuracy. Based on what I see on film.