StarEye: I didn't recognize some of the music, and after checking out the Amiga version, it seems the PC Floppy version has some extra music that the Amiga version doesnt have. In Gobliins 2, for example, The first screen has a tune that doesn't exist on the Amiga version, which plays the same tune from the second screen. I also found the PC floppy music to be more gentle, while the Amiga is more straight-in-your-face, soundwise. I gotta say, nostalgia leads me to prefer the Amiga version, but the PC floppy is still great, as it's almost identical to the Amiga version. Only different/extra music and a different sound between them.
Yes, the Amiga version has much less different tunes, 5-7 if I remember correctly. But some of them were completely different and really AWESOME, since the Amiga was capable of much better music samples than MIDI could offer at the time.
You can hear all of the tunes in this Longplay:
http://www.youtube.com/watch?v=beEeYbszF6w Skip to 0:24:00 to hear the awesome dream world music, one of my favorites from the amiga version.