I would take Calzaghe. Even though Calzaghe only fought twice at 175, he would have been the bigger man simply because Torres fought at 175 during the same day era and Calzaghe had to cut down from 190 to make 168 and was likely over 175 on fight night. Aside from being naturally bigger, he had better hand speed. I could see him outpointing the defensively sound Torres.