GBA version, which I find the sound issue remedied by headphones. --- Playing: Ni no Kuni - Captain Whamtastic http://i.imgur.com/IVH6BX0.jpg Dragon Quest>Ys>SMT>Tales>Final Fantasy, but I enjoy all five. Da Bears!
The GBA has more content than the PS1 version, but it doesn't have the FMVs from the PS1 and you're playing on a smaller screen. For that reason, I'd go with the PS1 version. It contains the FMVs + you get to play on a bigger screen. And the load times for the PS1 version aren't as bad as people make them to be.
PSN vs PS1 disc is a matter of preference. Both software are identical, but if you're like me and you like having a physical copy of the game, you should get the PS1 disc.
The FMV's suck --- "Hey bridesmaid, love the beard! Give's me something to hang onto!!"- Lord Flasheart
Its definitely between the SNES and GBA versions. The GBA version has a bit more content but also supposedly isn't as clear audio wise and you would be playing on a smaller screen unless you have the GBA player for GC.