Both are dystopias which by definition rely on being set in a real world that could have once been Earth. A twisted version of our world. Star Wars… is Star Wars. You know?
I like to believe Coruscant was once an Earth-duplicate in its ancient past, like that planet from the TOS episode “Miri”. So for my money, THX 1138 and the original three Indiana Jones films all take place in the SW Galaxy.