For RPGs I'd say the PS market is the better of the two.
Maybe MS have made a deal with Bethesda or something to actually have it on the 360 - they need RPGs, especially if they want to do well in Japan.
Heck, when Blue Dragon came out 360 sales tripled... but it was still outsold by the Wii and the PS3. The Japanese don't seem to like the 360, methinks.
Threaded Mode