[quote name='2DMention']Is this worth it if you already played and beat the 360 version?[/QUOTE]
If you actually liked it enough to ever want to play it again (unlike most people, apparently), I would guess yes. I picked it up recently, though I haven't played it yet. A few new characters, some new chunks of story, new costumes, a couple of new dungeons, and I believe the difficulty was amped up a little bit; definitely worth the $15 imo.