100% Empire. Star Wars ships with hyper drivers are so much faster than Warp Drives. It takes the Millennium Falcon hours or a day to get across the galaxy. It takes Voyager 80+ years. It takes weeks to traverse the Federation alone. If the Empire was completely out classed in combat by Federation technology, and that’s a big if, the Empire would have zero issues just glassing every planet while the Federation would take days to respond.