I voted FFX-2 because I honestly feel it's a better game than 9. The job system was awesome and addictive, the storyline was light and funny, the perfect counterpoint to it's predecessor. 9 had the weapon system which I hated, and couldn't seem to make up it's mind whether it wanted to be funny or sweet or sad, and tried to juggle too much, but still had a deeper story.

So in short FFX-2 because I like the game system better.