I think in general communication that “climate change denier” is understood as meaning “person who denies the scientific consensus about modern climate change”. Similarly to how when “creationists” are mentioned online it’s short for “young-earth creationist” even though that’s not the only kind of people who believes…

The difference between climate change deniers and man-made climate change deniers is that man-made climate change deniers deny humans caused our current, rapid climate change. There are also some people who accept that climate change is happening and that it is man-made, but who are afraid we can’t stop it because it…

Seems to me there are climate change deniers, and MAN-MADE climate change deniers. Everyone seems to throw them in the same category but from what I’ve seen, the root difference in the denial is whether humans can really do anything to reverse it, or even stop it.