I loved this post. I've read and loved (sorry haters lol) the twilight books. It got me into reading vampire fiction again after years of moving away to pure romances.
Then I found undead books. Oh those pretty little things are like Buffy with more attitude and better shoes. Betsy has attitude and I adore them, even more than the twilight saga.
But personally, I do see them as two different series altogether. I can't draw any similarity except for the fact they both have vampires and wolves in.