So, I guess the answer to the thread title is that Star Wars is different from the rest because only this score inspires people to think they're better than John Williams, so much so that they can put together a superior score by simply editing a few clips. But back on-topic: I remember hearing one time the phrase "sequels aren't real movies." Now I don't totally agree with that, but I think there's a valid point there, especially as far as SW is concerned. As many have said, Star Wars works as a stand-alone movie. It's the only one of the series that does. ESB and ROTJ are both extensions of the original film, and the PT is an extension of the original trilogy. Each successove movie (in order of production, not episode number) builds on what has come before, and seeks to add touchstones here and there to remind you of what you felt while watching the previous movies. Example: TIE Fighter Attack from SW is repeated when Lando is flying through the second Death Star in ROTJ. In SW, the music is purely about conveying the tone and excitement of the scene. In ROTJ, the music is used to convey the excitement of the scene, but is also intended to force memories of the excitement from hearing this music in the original film. The above example is one that I believe works; it doesn't always.