I am assuming that Akabane is stronger. Kagami is too slimy and up to no good -- so he has to fail in the end, right? That would be justice!
He is pretty tough, of course; probably one of the toughest guys out there. But I get the impression that he's not the top dog even as strong as he is, so he's bound to have some weaknesses that Akabane can exploit. And he's really too full of himself, and that kind of guy always loses in the end.