The Lemmings soundtrack is, needless to say, very cute. ^_^ Some songs are really enjoyable to kill Lemmings to, as to the almost monotonous happiness in each composition.
Ahem :) As for the variants for each game, the ideas stay the same. The game lacks in sound quite a bit in the console versions, with the cheesy samples and poor use of effects :S, but the original makes an INSANE use of AdLib... It's truly amazing to listen to the instrumental variations and complexities.
What's new? 
Slovak version