Not all undead creatures and characters are versions of Frankenstein, as they fall into other categories of Reanimation such as a Zombie.
Frankenstein's monster has appeared in many forms and inspired many similar characters.
The 1818 novel describes the creature's appearance as: "His yellow skin scarcely covered the work of muscles and arteries beneath; his hair was of a lustrous black, and flowing; his teeth of a pearly whiteness; but these luxuriances only formed a more horrid contrast with his watery eyes, that seemed almost of the same colour as the dun white sockets in which they were set."
This rendition of the creation is the most pervasive and appears in pop culture and advertising very frequently, giving it an iconic image and status.
While the imagery of Frankenstein's monster in relation to the Universal appearance is clearly inspired by Frankenstein, it is also frequent that characters of this appearance lack any relation to the novel and depart heavily from the themes and personality of the original work.