I know that Tales of Eternia for PSX is the same version in both US and PAL territories. The PSP version is the exact same version as well, just widescreen.
I'm assuming the same with BoF3, but I only own the PSX version and have yet to play the PSP version.
Disgaea 2 is actually being ported to the PSP as well. It's not here yet, but we all know that crappy game will be here one day. The Disgaea games and pretty much any tactical RPG NIS makes is a joke.