In fact, it was Iron Man’s overall popularity that made Marvel have faith that Avengers might work. While the Captain America films required a real hook for people an audience to arrive for those, all Iron Man movies needed was the title and views were guaranteed.

Iron Man Has Beaten Captain America More Times in The Comics. With all these comics taken into consideration, it's evident that Iron Man is the clear champion. While Captain America has had years of combat training before even joining The Avengers, Stark's Iron Man armors are in a league of their own, both technologically and power-wise. But that does not mean Captain America is to be underestimated.