How does he compare again? The Imperial Guards strike fear into the Dark Council, and Scourge took out one of their leaders. Whereas Vizsla is the run-of-the-mill We-Need-Another Mandalorian. He's not immune to TK, Maul showed that enough, but the Imperial Guards are. He might compare in skill, but even then defeating Vizsla, which Ahsoka did not in terms of skill, does not compare.