The differences are, in the final mix version (the original PS2 version) is a japan exclusive game the text is going to be in Japanese also you can get a PreModded ISO of it to have an english. 3+ hours of high definition cutscenes with Kingdom Hearts Re:coded.

Kingdom Hearts Re:Chain of Memories improvements include: fully 3D render, Kingdom Hearts II reaction commands system, new cards and boss battles, all scenes now fully voiced in Japanese, and the game save data affects Kingdom Hearts II: Final Mix+. Includes Kingdom Hearts II Final Mix and Kingdom Hearts Birth by Sleep Final Mix. Kingdom Hearts II: Final Mix+ improvements include an English voice cast, tweaks in all difficulty modes and a new 'Serious Mode' difficulty, new areas and redesigned navigation maps, new scenes from the Japanese Manga, new boss battles against the mysterious Organization XIII, one of the fights that was a cut-scene in the original is now playable, and all censored parts of the game are no longer censored.

5 /5Kingdom Hearts II: Final Mix+, only released in Japanese territories, is a 2-disc set that includes Kingdom Hearts II: Final Mix+ an updated re-release of the original Kingdom Hearts II and a 3D PS2 version remake of Kingdom Hearts: Chain of Memories called Kingdom Heart Re:Chain of Memories with extra scenes and voice-overs for particular scenes.

Kingdom hearts final mix iso english