Not sure if this is posted yet, but I've yet to make a contribution to this community:
http://www.amazon.co.jp/gp/product/B000HQU...9147426?ie=UTF8The amazon jp product link, with a preview movie (direct WMP streaming link follows)
http://www.amazon.co.jp/gp/amabot/?pf_rd_u...MFSMXWNDY8R6NWAThe main difference is, I think, more voice acting and different combat special effects. I hate to say this but I like the hand-drawn ones better than the PSP-animated ones. The US audience for this game is definitely those that missed out buying on the GBA, because the game seems otherwise identical.