I've played both the Sega CD versions and the PSX versions...I'll note here that Silver Star Story Complete has a completely different soundtrack for totally unexplained reasons. I prefer the Sega CD music.

As for Eternal Blue, the soundtrack is identical on the PSX, if I'm not mistaken.

All are pretty prototypical JRPG fare, but they're in the upper echelon. Entertaining for a playthrough.