Quote Originally Posted by Spellbreaker26 View Post
The difference is that Belkar has no specific abilities that work against vampires, but Durkon does. Durkon can also cast Resurrection. So an Order with Durkon not only might be able to defeat Belkar they would also be able to get him back.

That's what made losing Durkon so bad - he was the only one who could repair the situation. Even Roy would have not been such a loss as losing Durkon to vampirism.
Belkar actually most likely does have a specific ability vs undead. He has suggested that he chose undead as one of his favored enemies when he was threatening Durkon (from spending so much time fighting wights when they got split up). Still better to have Durkon than Belkar vs vampires though thanks to cleric spells designed to mess with undead.