Brothers can take this imo, not solidly though, RotS Sidious was clearly much more powerful than Tenebrous, and Tenebrous lacks skill feats to compare. He is very fast, and has very good TK but that's all.
__________________ ''You are no warrior, Maul thought. You know nothing of the dark side.'' ★_Darth Maul Respect Thread_★
__________________ "Happiness is a lie. Life is horror. The light is always dying all across the universe. The last star will flicker out someday, when it does, all that remains is shadow. And I will be its king!"'-Amahl Farouk