What final fantasy does XIII most closely resemble???

I feel that this game more closely resembles Final Fantasy X out of all of the other Final Fantasy games.

The story is FFXII's one, adapted a little. So is the "Innovative Paradigm Shift!". The levelling is FFX Sphere Grid style, with less choices. The L'Cie hunts are a rip of FFXII's hunt system and so is the openworld monster system. So I'm gonna say FFXII.

FFXIII in my opinion explain most of the things that lies hidden on the storyline of FFVIII.
And have a lot of similarities with it.

But I don´t wanna to discuss it here.