I thought I'd try get the normal Vampire disease, so I went to start the Laid to Rest quest, I noticed that Laelette looked so much different, like Volkhihar Vamps. I messed around until I contracted the disease from her. Waited a few days and after turning into a Vamp that way, I looked exactly the same as I did when I was Vampire Lord - no difference at all.
Yep. Rather than having 3 different strains of Vampirism to choose from (Cyrodiilic, Lore-Volkihar, and the new Vampire Lords), each with their own unique abilities and playstyles, Bethesda opted to go with one type of vampire, but give you the option of either being just a basic one, or the same one with the ability to transform, apparently not realizing that the ability to transform being the only difference between the two of them made the version that couldn't transform completely redundant and pointless.
I really wish Bethesda would explain this design choice, because it's by far the most baffling decision I've heard about in this DLC.