[crabapple]

Vampire are "higher grade" monster than are zombie, i.e., yampire maintain intelligence, read books, sometimes go to movies, converse, reason, etc. Zombie go "zzzzzzzzip!" when you ask it question. Even the smartest zombie gets problem turning on the Walkman.

And yeah, zombie got "quasi-scientific" explanation for return--voodoo poiso9n, crashed space probe, etc. One foot in the non-mystical camp. Whereasm, yampire is kinda spiritual, "of the devil" so to speak, and has more supreme powers such as flyin', floatin', telepathy, animal transmutation, hypnotism, prestidigitation, and so up.

Yampires can have fairly unlimited powers depending on which version of myth; but Romeroian zombies, the most prevalent type nowadays, they generally is kinda weak and vanquishable except in large numbers,m whereupon they kinda walk all over ya and then do lunch with you payin' the bill, so to speak.