Froch, I think is tougher & hangs better in the battle here, I was never a Collins fan, but I won't let that sway my choice, who knows, but I think Froch would be the betting favourite.
I would lean slightly towards Collins. He was underrated and Roy Jones ducked him for years. Collins wanted that fight badly. Froch was a good but not great champion. He was losing the Taylor fight when he pulled off the stoppage in the last few seconds of the fight. Some feel her got a gift versus Dirrell. He didn't have any answer for Ward, who was another very good but not great fighter.
I love contemplated this one for years now. I think this could be an excellent fight but if forced to choose I would make Froch the favorite. Collins was a hell of a good fighter though.
I can't see Collins outboxing the taller, rangier Froch, at long range. I can't see former 160lber Collins outmuscling the physically very sturdy Froch and forcing him back on the inside. I can't see Collins moderate power leading to a stoppage of the iron chinned Froch. Collins had a great work rate, but Froch was so fit I can't see him being outworked, even by Steve. Froch UD in a competitive fight, imo.