I actually prefer the GBA soundtrack to the SNES one at times. I think it actually improves some tracks. Especially the music that plays during your battles with Exdeath (in the castle and his first form in the void). The original one doesn't manage to make it sound like you're having an epic battle, it sounds rather dull to be honest, while the GBA does manage to capture that feeling of "epic battle with the big bad". The one thing I can agree with is some of the sound effects. It's weird, but there's something absolutely charming about that dull "thud" you hear when you kill a monster, both in IV and V, in the SNES versions. That's one thing the GBA didn't quite manage to capture, but it's a small sacrifice for all other improvements.