I wouldn’t be surprised at all if the end credits music in the film was different from the one on the soundtrack. For some reason, there has been this long-standing thing about changing the end credits in every single Star Wars film, with the exception of A New Hope (the end credits on both the film and the soundtrack are the same; unless you count the Special Edition’s film end credits, which wound up having sections repeated because of the added credits). Boggles the mind. Oh well, that just creates for us a sort of bonus track, doesn’t it?
I don’t remember the PT soundtracks other than ROTS, which had longer version on the soundtrack, but I’m pretty sure TESB and ROTJ have the same music on the soundtracks that are in the films?