For me, episode 5 is slightly better than 6. And when I say slightly, I mean that it could almost be counted as a tie. I really love these two movies!! The one major thing that does it for me in Return of the Jedi is the final duel between Luke and Vader. The duel in Empire is amazing, but in Jedi, Luke isn't just fighting Vader, he is fighting his father. I love the tension and emotions in episode 6. If it wasn't for the silly little fur balls in Endor I would rank 6 before 5! xD