Advancements between this time period and 4000 years later during the Empire's time just aren't that frequent. I mean, how many advances in technology occured between the fall of the Minoans and the rise of the Roman Empire some 3000 years later?
One of the most apparent differences is capital ship technologies. The Leviathan-type ships clearly has inferior defenses and systems compared to those seen in the movies like the Trade Federation Battleships, Imperial Star Destroyers, and Mon Calimari cruisers. I mean, the impact of Malak simply firing on Revan's ship nearly caused Revan to become braindead from the concussion! The crew of the Executor didn't have anything to worry about, until the shield system failed......