IN KOTOR 2 Kreia says if you think these are true sith you are mistaken. Indicating the sith the exile fought were nothing compared to the true sith (The Emperor)
I wouldn't interpret it in that way. I think she was referring to the mindless, animal nature of Sion and Nihilus who had been consumed by the dark side and had no real understanding of it - they were just raw power, honed by Traya and then let loose across the galaxy like beasts. She could also be refererencing to the difference between the Sith as a culture and a nation, with ancient heritage and links to the old masters, and former Jedi broken by war and twisted by hatred into dark side monsters.