Theres a difference between being in the same genre and literally ripping off ideas practically verbatim. Underworld practically stole the entire story/character structure from the game.
I read the legal brief about all the specific stuff White Wolf was bitching about in Underworld. Most were pretty freaking hilarious, like having vamps and WW's in the same 'world' at war... Ya that's really original.
This sounds like it's doing the same (even going so far as calling the game "Dark World" where White Wolfs system is "World of Darkness".)
This sounds like whiny bitching to me, pure and simple. Now if White Wolf coined 'World of Darkness' first, you might be on to something about copying generic names (unless of course you think World or Darkness, or putting them together is somehow unique and not really used in thousands of contexts), but it's not like someone is coming up with a game called Warcraft World : )
I know I'm being an ass, but I think these arguments are ridiculous, and I'd like to know where you base this on anyways. The link I clicked had barely any information, and the FAQ didn't have much more, most of it pretty standard fare. I'm not saying they're original, as vamps, ww's and oddly, humans, have been overdone already, but WW sure doesn't deserve any credit here.