I found another similarity between the series'. In both universes, werewolves run a few degrees hotter than humans. Of course, it's common knowledge (I sound so serious :)) that vampires run colder than humans. Maybe it's common knowledge that werewolves are hotter. I'm not sure because I don't know much about werewolf mythology.
P.S. I picked up the fourth Sookie book today (Dead to the World) and can't wait to start reading it tonight. My friend has told me a lot about it and it's her favorite, so she has me psyched.