Wow, that is a super tough choice. Both trilogies are awesome and both of those movies provide a satisfying conclusion to the trilogy. I may even like the Star Wars trilogy slightly better, but I think I have to give this match-up to Return of the King. Return of the Jedi is a good movie, but it is not the best movie in it's trilogy. Return of the King actually is my favorite movie in its trilogy. That is a movie that gives a very strong ending to the whole story.