Twi, winrar is the best thing to get. The older one is in a .rar, new one is in a zip
Steve Burke said it wasn't released by him nor Rare, and doesn't have some of the cutscene music (it just has one), the water temple fight, troll song, shadow troll background, badlands background or alternate theme song.
So, I think it is fair to say that it is an Extended Soundtrack, and with the game rip, it has the Complete Soundtrack.