No clue.... But Kreia did say Sith of the Old Republic are far more powerful than the more modern Sith, comparing the Exile to Naga Sadow, Marka Ragnos Im assuming.... I would think the Old Republic Sith, Malgus would be more powerful, killing Jedi consistently compared to Starkiller, if ofcourse you believe Kreia in saying Sith were more powerful back then, which made sense since Force Users were plentiful and constantly at war, Force Wars, Great Schisms, Jedi Civil War, this Great War, Sith and Jedi constantly fighting; Im certain the Rule of Two caused a significant slow down in progress in learning the mysteries of the force where in the past, there was a sect that was devoted to Sith Alchemy, specializing in that, another in Fear-Reverse Battle Meditation (Dread Masters), with the rule of Two, they stayed hidden, but progress was certainly limiting.... I wholeheartedly believe they were more powerful back then, and on that note more powerful than Sith/ Jedi today... throwing aside biased opinions of George Lucas, who compared today, hasn't provided 1 percent of the total Star Wars Lore, he created the foundation stone though and I respect him for that. But you cant tell me what he says is canon, ownership or not, he's a senile old man now who is constantly changing the canon of the films like an OCD patient.