It was an extremely close fight, and quite a shit one imo. I don't like Calzaghes as a fighter, the fact that Hopkins simply couldn't fight at his pace forced him to spoil endlessly and when I went to rewatch it a while back I just couldn't be bothered after a while. I don't think there's really even all that much to look for, neither guy was doing anything especially effective it just depends which style you find more aesthetically pleasing in the first place.