I love both, but Starwars will always be my favorite. Star Trek invokes more of a "realistic" sense in its story. Its based in a universe that is our own and all the technology is more grounded to what could really be created in real life, that being said, the story's are more realistic as where nothing is cut and dry and evil and good are the opinions of the beholder. Star Wars is more of a fantasy, a realm to escape to where even the evil bad guys know that they are evil and the good guys win because they have a great moral compass. One is a gritty, more realistic story that shows that lines between good and evil are blurry while the other is more of a fairytale that tells of morals, good and evil and an epic quest. A comparison would be that Star Trek is For Whom the Bell Tolls by Hemmingway and Star Wars is Homers The Odyssey