RicOlie_2 said:
Somehow there is a distinguishment (is that a word?) between Dark Jedi and Sith too, but that doesn't really count since they're essentially the same thing.
It's funny, really, how the Sith & Dark Jedi have been portrayed/characterized over the years.
In the 90's, the Sith in the EU-- the ones in the comics, at least -- were often labelled as Dark Jedi by the other characters in the stories, but they still had enough distinguishing characteristics to set them apart from the more mundane Dark Jedi who turned up in books like The Crystal Star.
Flash forward to today, and now there's this big distinction placed between the two, even though there's little-to-no difference between the two ethically or aesthetically (red lightsabers, pale white skin, yellow eyes, megalomania, uncompromising hatred for Jedi, etc, etc.).
I guess the only real distinction the two have these days is that Sith tend to amass armies and form empires while Dark Jedi act more as individuals or lackies to a higher power (which, of course, tend to be Sith).