User blog comment:B214/Question and Answers 4/@comment-1.53.56.192-20141201134929/@comment-76.0.18.173-20141202170838

Yes Gasper fought Georg, but he was using his sacred gear. Up till now we haven't seen a vampire actually fight using their "vampire abilities". They may fight simular to  Alucard from Hellsing (at a lower level of course) or maybe only Gasper can do that with his sacred gear. We may not ever find out unless the vampires come out to play.