Best way to play FFVI is the GBA version with the Color and Sound Restoration patches applied, trust me. I'm probably going to get flamed to hell for this, but nostalgia aside the US localization completely butchered the script. If you care even a little bit about the story, please don't play the SNES version. The best thing would be if someone modded the GBA dialogues into the SNES version, should be completely possible AFAIK. Pretty weird nobody did it yet. I may try doing it myself after I get more programming experience, it'll take quite a long while though so don't count on me lol. Even with the patches applied though the GBA version's sound still isn't up there with the SNES version, and you're also losing quite a bit of viewing space in the GBA version because it's cropped to fit the GBA aspect ratio. At least though the dialogues are an actual translation, and not a typical 90s US butcherization localization, so it's completely worth it imho. It's unacceptable that such a gem of a game still doesn't have a decent way of playing it in English after more than 30 years.