I do judge vampires differently from humans. What I can tolerate a vampire doing, or happening to a vampire, I cannot with a human. This extends into AU human, when either one or both of them become human. I then cannot let them be mistreated, or mistreat in human form.

I expect vampires to have a demon, and therefore to behave differently from a human. If it is Angelus or William the Bloody, I expect them to feed and be evil.