lots of different ingame tunes...
Well, maybe 6 tunes that are not too long
But still way better than the Amiga one. The midis actually help create a dune atmosphere, the music fits so well with the game.
I'm having trouble thinking of another game though, ignoring bad Amiga arcade ports of course. The Amiga versions of games were usually not only the most playable, but despite the fact that the games had less colours they were put to a much better use. Just look at HeroQuest for example, the 256 color pc version looks like CRAP compared to the Amiga version. The palette used is grim and dark and it just fits the mood of the game so much better.
(pictures near the bottom of the page)