all the vampires are the exact same as The Order, they are not hurt in sunlight, they dont live in any icey lakes, none are very strong, you cant become a vampire other than The Order eve if a "volikhar" bites you and some people have supposedly found a journal that explains that The Order has taken over skyrim and gotten rid of the volikhar
If you could link me to such a journal, Id love to read it, I have not come across it.
Hm.
Well, yes, the Skyrim vampires are similar to the Oblivion vampires in gameplay, on the surface.
There is however that all the high level vampires of Skyrim are Volikhar, and that if you get the disease from them or any other vampire it has a different name to that in Oblivion.
So in the end this is all due to gameplay thingies.
They are intended to be Volikhar, as their name and other evidence suggests.
It wouldnt be the first time, even in Skyrim, that things dont exactly match their lore-counterpart, and its usually due to gameplay thingies.
My normal standpoint on dealing with any lore that conflicts with other lore is to declare them both true, for a given value of godhead, and in this case I would say the evidence suggests that the Skyrim strain of vampirism is intented to be Volikhar, with their abilities a port from Oblivion because the fans requested vampirism a lot and there wasnt much time.
In any case, necromage vampirism is awesome. It affects perks as well.
