There are atleast 2 distinct versions of Final Fantasy X (FF-X): the international version which has Dark Aeons and a revised sphere grid, and the US release. I'm not sure if the US release is same as the original Japanese one.
How many different versions exist, and what are the gameplay differences between them?
Best Answer
There are only two released versions of Final Fantasy X: the regular edition and the international edition.
The regular edition was released in the Japanese and North American regions.
The international edition was released in the Japanese and European/PAL regions (released simply as Final Fantasy X there). It contains the things you listed:
as well as a number other minor changes, as detailed on the Final Fantasy Wikia: