Alright I've played and beat Persona 4 and then I played and beat Persona 3 and then I beat SMT: Nocturne and now I'm jumping into Persona 1. Just finished downloading the ROM.
What can I expect?
an old, rotting slaughtered carcass of a localization job
a soundtrack that kicks the ass of the otherwise superior PSP remake any day of the week
The PSP version had new music that didn't fit at all but the game itself was pretty much the same. The PS1 had all kinds of fucked up shit. Rates were weird, an entire route was cut out, the setting was changed to "appeal" to Americans. Also one character became black which is hilarious but still not a very good change.
Play Innocent Sin on PSP.
For Eternal Punishment, PSX is your only option
The concept is nice, but no one enjoys spending half an hour reshuffling their fusion until they get something they like. It's shallow and substitutes bullshit for challenge or fun. It took Persona 4 Golden of all games to get it right, though it gets gameplay wrong in almost every other area.