there's not much difference since all ps2 here have mod-chips that enable region-free gaming.

according to p-a prices, the NTSC/J Asian version is cheaper by USD10

http://www.play-asia.com/paOS-13-71-45-77-...08-70-28zk.html
http://www.play-asia.com/paOS-13-71-45-77-...08-70-28wa.html

yes, most ps2 game in NTSC/J are JPN language only although there are some exceptions like those EA published game. Asian/JPN PS3 can only play ps2 games that are in NTSC/J format

for FFX, u got option

http://global.yesasia.com/en/PrdDept.aspx/...pid-1004571154/
^this one have ENG voice-acting and text

http://global.yesasia.com/en/PrdDept.aspx/...pid-1004040333/
^this one full JPN voice-acting and text

EA have English support for NTSC/J Asian version of their games.