Lord of the Rings is better because of the rich literature history Tolkien developed, to make middle earth, hundreds of characters, dozens of races, even more languages. Star wars is young, and lacks the individual dedication and richness Lord of the Rings has, one man dedicated his life to it, 40 + to Star Wars, the information is inconsistent and confusing, it is not linear, and lacks concrete ambition, meaning it lacks a linear singular interpreter, or interpretation, and opens the door for to many wannabes to write their own interpretation for what really did happen.
While it's true that the rich literature of Lord of the Rings brings in more fans, it is also true that Star Wars is of a completely different genre of writing. While those fantasy readers may enjoy reading Lord of the Rings, the science fiction readers enjoy Star Wars more. Those two genres are made up of different types of elements. Science fiction is usually more realistic than fantasy, so it gives inventors new ideas to try and sparks a creative part of people. Fantasy, though it seems like a wonderful world, is purely fictional and usually has no way that it could be real. It is more of a 'back then' feeling, while science fiction is more of a 'futuristic' feeling. The "this could be real in the future" appeals to many people. They have all this idea of that humans will one day be intelligent enough to make this, while they know that humans and horses can't evolve into elves or dragons.
Lord of the Rings inspires no true creativity, whereas Star Wars has inspired much creativity in the youth. There have been many stories inspired by people who read Star Wars. It causes the fountain of creativity to flow into the minds of others.