The Thing is pretty tough, but in the end he’s never been Hulk level. Hulk is just in another league. Hulk got the power cosmic and also became the Worldbreaker. Thing’s pretty strong, but he’s not quite that strong. Of course Thing and Hulk became rivals somehow. So even though Thing is far weaker he’s gotten his share of hits in.
Of course he can never quite hope to take the Hulk down in a fight. Hulk’s just far too powerful. This makes Thing fall even deeper down the rankings. Maybe one day he’ll score another win and move back up. Of course for Hulk things are just dandy right now. Hulk wins.
Fanfic version below