At this point, I think Sasuke would soundly beat Kakashi. Sasuke has grown so much, to the point where he's a more well wounded shinobi than Kakashi. He has superior taijutsu, genjutsu, and ninjutsu. Not to mention, it seems Sasuke has a superior magekyou sharigan. And Sasukes stamina is off da charts, as we have seen wit his fights wit killa bee, Danzou, and especially his all out brawl with da kages. One of Kakashis flaws was that he never had GREAT stamina. Long story short....kakashi puts up a fight, only to get beat by Sasuke in the end.