I was flipping channels recently and passed the original FF movie. It was weird to see Evans with the buzzed brown hair as Johnny Storm, cracking jokes and being a ladies' man, because I was so occupied with him as Cap over the course of 2011.
Regarding the main question, there's no debate: Captain America was a better character in a better film, and Evans played him to perfection, so you gotta give it to Cap. But Evans really showed his talent and range as Steve Rogers (remember how concerned everybody was before the movie that he would be constantly joking, hitting on chicks, wearing a permanent smirk?). I hope he gets good parts in other movies because I've really grown to like him as an actor.