Personally, however, I prefer the RotJ duel because of what’s at stake in the moment. The scene isn’t really about the physical fight itself. It’s a spiritual battle between Light and Dark. The sword swinging is really just a backdrop to the struggle in both Luke and Anakin’s hearts against the absolute evil of the Emperor. And I always get chills when Luke shouts “Never!” and the chilling music starts. The choir that sings both during Luke’s outburst and when Anakin is about to save his son is really stunning.
Me too! I also love the music - the weird synthesizer when Vader (holding Luke’s lightsaber BTW!) is looking for Luke in the shadows, then the chorus when Luke unleashes his anger.