Sure. The science fiction doctor might have a completely different personality, origin, or mission compared to Doctor Who. This could be due to the creative direction of the specific story or franchise.
Definitely. Usually, in science fiction, different doctor characters have their own unique backstories, powers, and adventures that make them distinct from the well-known Doctor Who.
Yes, they are. The science fiction doctor in question likely has distinct traits and storylines that set them apart from Doctor Who.