I stumbled across a bunch of GBA rom hacks that add in things like the SNES sound-track (GBA is highly compressed I guess?) and re-colors due to the GBA either being too muted, or too bright in weird ways. Though I never played the GBA version, but if that is people's preferred version, then you have the option of making it even more perfect
I tried an SNES one that was meant to re-do Woosley and be a bit more literal and tie things in better, but once the Espers started being called Eidolons I turned it off. Which may even be in the GBA version for all I know. I was taste-testing a whole bunch of stuff at the time, trying to find my perfect FFVI. But GBA was chugging on the emulator for some reason so I gave up without making an actual decision
