I like the Thing; i really do. But i'm getting sick of hearing how he's always the better fighter. Ben Grimm was a star athlete before becoming the Thing. He gained speed and strength and durability and inv. but much like Prof. X trains his mutants to be in Olympic level shape, that's all the Thing has.
Colossus is really a great fighter. If you ever go over his encounters you'd have to say that he knows how to fight well.
It's just logic; the same as adamantium cuts things so do is steel stronger than brick.
Colossus used to be the underdog to the Thing when he was a teen ager but he's all grown up now. Now it's lights out Ben.