I think it'd be a one way domination depending on where the fight took place. I dont like Kongos chances having a 260 pounds wrestler ontop of him if it hits the ground. On the feet it's no contest, though. Kongo is infinately more mobile then carwin. He has a 2 inch reach advantage, a speed advantage, and over all striking advantage in every aspect except power. Carwin would get lit up on the feet.