Duran by commanding decision. The big differance would be speed. Duran's far quicker hands would allow him to beat JCC to the punch all night, and Duran would MORE than hold his own with Chavez on the inside. Chavez made a career outta wearing guys down in the long run, but this is one fight where JULIO might be the one wearing down late. None with Chavez's style would ever beat Duran.