The game is essentially a proto-FFXIII.

- Long walkways.

- A more expansive, open area, that is situated towards the end of the game (Calm Lands / Gran Pulse)

- The mini-games are not the best (FFX: Annoying, tedious, loooong. FFXIII: Non-existent, hunting one is loooong)

- The status quo is overturned (Yevon is falsified, summons gone. Cocoon and Fal Cie fall)

- Weapon customisation systems

- Both have console sequels


There's probably more, but they're the ones I can think of!