Should I buy Pokémon X or Y? Thoughts please.?

I've just gotten a 3DS, my first DS since like 08 and I want to get the new(er) X or Y, they seem like they'd be a lot of fun since it's all new region and new pokemon and a new story to experience.

Do you think one has better pokemon than the other? I know you can only catch certain pokemon in one game and not the other.

Or rather.. which Legendary on the box do you think is better? Because that typically is the main reason why people choose their version.

Thanks for your time.