Never been to DL, so I can't compare the two. But I will say that I've been enjoying Space Mountain at MK from the 80s, and it never gets old. It is a little rough, but that's what makes it fun; rough, wild, and pardon the pun, "out of this world"! It's hands down my favorite ride in all of WDW. And apparently I'm not the only one who loves it. Every timeI I visit MK, Space Mountain consistently has one of, if not the longest wait times in the park.