I just like the setting more, with the Illuminati, Templars and secret societies stuff, and mmos that take place in the real world (well, with monsters and magic) are just so damn rare, so far I don't know which locations will be available but looking through the website you'll have a ton of places, like New York, Transylvania, Seoul, etc.
But what makes me interested the most is the classless/level-less system, it just sounds so fun being able to build a character however you want to, like using skills that you actually want to use and not just use them because you have to since you don't have any other options.
Heck maybe I'll play both, in the end it's only one subscription fee.
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http://en.wikipedia.org/wiki/TORtanic