What type of vampire ONLY drinks the blood other vampires or if not possible what kind BOTH humans and vampires?

A vampire that ONLY drinks the blood of other vampires is known as a "sanguinarian vampire". Sanguinarian vampires are extremely rare and are often considered to be extremely powerful and dangerous. They are said to be immune to the sunlight and other weaknesses that traditional vampires have and are said to possess unique abilities and powers.

On the other hand, a vampire that drinks the blood of both humans and vampires is known as an "omnivore vampire". Omnivore vampires are more common than sanguinarian vampires and are often considered to be less powerful. They are still strong but not as strong as sanguinarian vampires and are still vulnerable to the weaknesses that traditional vampires have.