What do you think about games that were released on both cart and disc? There's the Mortal Kombat games, Earthworm Jim series, Mega Man X3, and even Doom, just to name a few.
What fascinates me is how I generally prefer the music of the cartridge versions of the titles. Does anyone else think that the music in the PSX version of Mega Man X3 isn't as good as the music in the SNES version?