Well ever since Final Fantasy had its first date to the Playstation one, they've been married ever since, from Final Fantasy VII, VIII, IX, X, and XII its been a mainstay. However now many games are porting to the Xbox.

Grand Theft Auto IV, a game which like FF was dominant on the Playstation was ported to Xbox 360.

However to say what will be better... its Tough. Xbox has a better multiplayer than the playstation (In my opinion) however this ain't a XI, its a single player and I think the playstation 3 would be the best pick.

Although whatever system your comfortable is good.

I think the developers will pay more attention to the playstation 3 version.