Basically Zombies and Vampires behave the same: they can't be killed easily. Zombies can be chopped into pieces and then are pretty harmless because dumb. Vampires are more intelligent, if they team up, they do that strategically. And if you chop them into pieces you have to make sure you cut the head off properly or (depending on the fandom and mythology) stab them into the heart. On the other hand do vampires react to lack of feeding. Zombies usually do not. But they are slower. And can't do fancy transformations. So I'd go with the homo sapiens sapiens vampyr just because I think the one WITH a brain has better chance then the group collectively searching for them.