There are a lot of differences, actually. The major ones being that there are some songs that weren't even in the movie. (The scene in the movie of Roger and Mimi talking for a split second right before 'Over the Moon' is a major part of the stage version) Another major one is in the movie, Joanne and Maureen have their commitment union or whatever they call it, and when Joanne sees Maureen flirting w/ the bartender, it's kind of the last straw, so they break up, which then goes into Take Me or Leave Me. It's totally different on stage. The commitment ceremony never happens, their reason for breaking up is because Joanne sees Maureen kissing another girl during La Vie Boheme, (Joanne is gone during LVB because she's still at the lot packing up, but she comes to the Life Cafe for a little bit to ask Maureen something) so Joanne tells Maureen she has to move out. They break up and get back together over the course of a few months, (so Mark tells us) and one day while they're rehearsing for another protest, Maureen freaks out at Joanne and THEN they start singing Take Me or Leave Me. Seasons of Love takes place at the beginning of Act II, not Act I, and the order of a few other songs got flipped around for the movie. There are a lot of 'tune ups' and 'voicemails' that are sung during the stage show that were mostly spoken in the movie. In the movie, Out Tonight takes place at the Cat Scratch Club, but in the stage version it takes place at Mimi's apartment. Basically, there's much more spoken dialogue in the movie than there is in the stage version. On stage, basically everything is sung. There's other things too, like small lyrical changes and things like that.