Is FF X-2 like FF-X
Complex question ;]
Well, it's a Final Fantasy in that it is a direct continuation of the story from FFX (no matter how butchered it may be). It's a FF in that it has a FF style random battle system and FF related spells and characters (which FF12 kind of does, but some of it it doesn't).
It does NOT have FF music (it's very good, but it's completely innapproriate jazz/funk/electronica in most cases), it has a cheesy Charlies Angels-like girl power feel throughout the whole of it, it's the shortest FF in the entire series, it does the previous storyline no justice whatsoever (it only pretends to be tied to the previous game, that is until you play it and realise that is feeble at best) and in general is a terrible sequel to a terrific game.
On it's own merit, it could pass as an enjoyable RPG which is still closer to a FF than FF12 is (even though FF12 is still a very good game and you're missing out), if the girl power frenzy doesn't annoy you to the brink of hitting those closest to you.
In summary - if you watched Charlies Angels and didn't feel like walking out AND you played FF10 and are looking for FFX-but-completely-different-almost, then get it.
If you are looking to get lost in a very good RPG for countless hours (I still havn't finished it), or if you enjoyed the world of Final Fantasy Tactics, get FF12 ;]