You can't beat the sound of the original SNES.

The music, the sound effects, the overall audio quality is the best there is. And play control is a snap in the original, I'm not sure what it's like in the iOS remake cuz I've not played it.

Anyway, the sound profile of the SNES version tops the GBA version's, for sure. I guess if you want it on long flights/bus/car rides, though, the portable versions are preferable, too.