i love this game.

can anyone tell me if there is a difference between persona 3, & persona 3 FES???

'cause the copy of persona 3 that i have now is just rented from a game store & they don't sell it anywhere so i'm trying to order it online but the only version i see is the FES one. & i want to know if it's different & if i can't use my current gamesave on the FES. =.=