I guess I like the SNES version better.
Listen to :15 on the Genesis version. It's that kind of high-pitch that I dislike from the system. TO BE FAIR, however, I am aware that a lot of games DON'T have that kind of pitch and I do enjoy game music from Sonic, Phantasy Star and Streets of Rage 2 but even they have that very specific Genesis 'sound'.
Somebody else in the topic described technically very well the difference between the two so I now understand why each system sounds like they do. I have nothing against the Genesis' sound and do like quite a number of games on the console, but for aforementioned reasons I'll always prefer the SNES.
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Talk about backseat fishing
http://i.imgur.com/VqWjuCs.png