I didn't like either one, but objectively speaking, Joe was much better. He'd have beaten Froch wide - 9-3 or 10-2 on the cards.
Think Calzaghe would possibly get floored in this and Froch would win some of the latter rounds but ultimately Calzaghe too fast and skillful.
One sided points victory for Joe Calzaghe...leaving precious little for Froch's obnoxious, loud mouthed wife to cheer about.
I think Froch fights in awe for eight rounds, before realising he has a chance, but by then it is too late. Calzaghe by comfortable decision.
I'm waiting to see if Froch ever thanks Joe Calzaghe for ignoring him and staying retired. Had Calzaghe answered the, at one time incessant, calling out from Froch - this, before Froch was really carving out any kind of serious name for himself - he would have taken an utter pasting from Joe, with career-changing implications. I doubt Froch would have been able to go on to create a legacy of note, after Joe had finished with him.
I like both guys but I feel the best Cal would pull it out on points .. in many ways, to me , he was a modern version of Greb with the speed, angles, volume , heart and condition .. taller too .. didn't have the chin either but that's my point .. kinda.