That is interesting information. I hate to admit, but my entire experience with Faust is reading about the silent film in one of my horror film books, but I intended to at least go through that film during the development of this game. Also, that second image reminds me of our own devil villain, Iscariot!
You're right though, I'm sure the physical features of our rendition of Dracula never crossed Stoker's mind. Perhaps we can have character art for the true "human" version of Dracula, before he was killed and resurrected as a vampire. This version of Dracula would have to more closely match what the people of the time period looked like, similar to how Dorin's face was directly inspired by Vlad the Monk.
However, Carpathian Night will have a strong "otherworldly" aspect to it, because we are structuring the story around Scholomance, school of the Devil. Without revealing too much, this was part of what guided the character design - we did not want students of Scholomance to appear "worldly", they have to look like the came from a completely different realm of existence, in this case, the realm of the Devil. In our lore, Scholomance is not on earth, only the portal to Scholomance is physically located in our world. The rules for everything, including physical appearance, must differ in the realm of the Devil in order to make the two sides of the battle more distinct. This is why Dorin, who is an average person, looks like the people from his era, but Dracula and Irina, who spent years in Scholomance, have taken an otherworldly appearance. If we do go through with the character art for "Human" Dracula, I think it would have to much more closely adhere to what an actual person of that era looked like, but not when he's been living under the study of the Devil himself for five years.
Plus, we aren't only taking inspiration from Dracula, as this is a monster-mash story. The Bible describes the devil as being beautiful, a visibly perfect being, who then turned to evil. It would not be out of line for the Devil's primary disciple to be reconstructed in his own image, including the way he presents himself visually. If we choose to portray the Devil in Carpathian Night, brace yourself because he will be made to look like the divine being of beauty as described in the holy text.
I invite you to keep posting these bit of knowledge, because they are genuinely interesting, but just keep in mind that we definitely need to take creative liberties and fill in the gaps, because Bram Stoker never wrote a story about Dracula commanding famous Universal and Hammer horror film monsters, so we are working with a massive contradiction to the source material from the very start.