Just because it has Rune in it doesn't mean the name is similar. It's not a mutant offspring, and is nothing like RS. At all.
And it is very different from WoW.
I disagree with the different from WoW thing.
It's like a carbon copy of WoW, only with additional features.
EDIT: Also, the PvP is okay... you really need to specify the conditions of a duel before hand though. Such as no using potions. With potions the way they are it's just a duel to see who runs out of potions first.
Then again, I dueled someone of a higher level them me, they spammed potions and I used one or two. Still was owning him, I gave up and told him he failed and just walk away.
EDIT2: My friends name in game is Zardan and he is a Rogue + Warrior, and I think his levels are 14/13. You can add him if you want, even though he's not part of the BL community.
