Well, Archie was an all time great, obviously, and everyone has to admit that Calzaghe is a terrific fighter and a true all time great himself, so this one is a close call. I'll take the modern fighter by UD. MTF
15 Rounds, I'd go with Archie in a tough one as Joe would have given anyone problems with his southpaw style, movement and stamina, but I see Moore pulling it out late as he was so strong and determined.