Is Operation Flashpoint like WW2 Online, only better?

[RedRooster]

Is it a similar game? You get to drive vehicles and such?
I really liked the sound of WW2O before it was released, but since it's so buggy, I won't be buying it.
Is OF a really good game? I'm looking for a new massive online war game, although Day of Defeat is still keeping my interest very nicely.