Final Fantasy XIII was originally started using Unreal Engine 3. Eventually it was found that that wasn't going to work because UE3 is ass to work with on PS3. Thus, Square completely scrapped what they had and restarted, starting with a completely original dev tool called Crystal Tools. Thus, what we know of FFXIII came to be. And yeah, Japan gets it at the end of the year and we get it Spring 2010. I'm purposefully blacking out all information I get on the game from here on out because I want to try to recapture what I loved about Final Fantasy to begin with. I want the whole game to be fresh and exciting and I don't even want to know how to get skills in the game until I see an in-game tutorial or something while I'm playing it.
FFXIV is using a much-updated FFXI engine and is actually really different. No leveling, stats based on equipment (so like Monster Hunter here), you can switch jobs on the fly, all sorts of other stuff. Someone's just trying to make a poor joke with the wikipedia thing. I don't really ever play MMOs of any kind so I don't really care about it too much, but I like the changes.