It's a mystery. Froch is much bigger and better than anyone GGG has faced before. GGG is the superior skilled boxer.
It could be a really dangerous fight for Carl. The amount of damage he is capable of taking could get him hurt.
It would love to see this fight, don't think GGG would blow Froch away however I do think he would be just too much for the cobra but you can never write Carl off.
At 168 i'd bet my house on Golovkin getting brutalised. Froch might not finish him, but Golovkin would be spitting and pissing blood for the following week.
Probably the one fight in boxing that I'd most like to see. Sadly it probably ain't gonna happen with Carl apparently just a coupla fights away from retirement and GGG not yet bringing enough to the table. Could go either way. I'm leaning towards a GGG decision, but there's no doubt it would be an epic war.