Colossus has taken on the Thing in the past with pretty good results. That will be the outcome in this round. The Thing may be a powerhouse, but in the end he was never able to take down someone as powerful as Colossus. Colossus got the phoenix force and with it he’s nearly unstoppable! Colossus wins.
DReager1.com 
One heck of a fight but Thing wins. Although I prefer Colossus.
If not for the Phoenix Force, then I may have been inclined to agree with you here!