Danzo is a strong fighter with a lot of tricks up his sleeve but at the end of the day tricks aren’t going to be enough to defeat an opponent of Sasuke’s caliber. Sasuke is a true Uchiha elite who can adapt to any kind of fighting strategy and still manage to come out on top. He leaves Danzo in the dust here because that guy will absolutely not stand a chance against such a powerful fighter. Sasuke will always be one step ahead with his speed and strength. Sasuke wins.