Last year, in the months following the release of Nick and Norah’s Infinite Playlist, starring Michael Cera, and Adventureland, starring Jesse Eisenberg, movie blogs were abuzz with posts about the seeming interchangeableness of the two actors. For most of their careers, they’ve played young, lanky, sensitive types who serve as the moral center of movies where the adults (and other teens) behave in decidedly amoral ways. With the mainstream appeal of Juno, Superbad, and the (canceled) TV series Arrested Development, it seemed Cera was pulling ahead in the popularity contest. But now, with two films opening May 24 (Solitary Man and Holy Rollers) Eisenberg is making a strong move for first place. Which, no offense to Cera, is where he belongs.