Sauce K is better off being a good guy, after all, he was based on kurapika...
Perhaps, but there are huge differences between the 2. First off, although Kurapika's motive is vengance, there's a limit to how far he'll go and has a sense of mercy, and doesn't let vengeance consume him like Sasuke.(although I haven't gone all the way through hunter x hunter. I'm currently on chimera ants) Second, Sasuke doesn't care about being just, Kurapika does.