The Star Wars Extended Universe, despite taking place in an entire galaxy, has always been ludicrously small when it comes to things like this, and this game is no exception. Millions of planets, and where do we visit? Hoth, Tatooine and Taris. Thousands of corporations, and who inevitably designs the ships for each incarnation of the Empire? Sienar Fleet Systems. Billions of people living on Alderaan, and who do run errands for and/or slaughter? House Organa. Despite the futuristic setting, technological stagnation has also been a long-running hallmark of the EU. We're several thousand years before ANH, and yet nearly every race in the galaxy seems to be at exactly the same point in their technological evolution that they are in the original films. So yes, the ships look the same. So does everything else, if you look closely. It's not this game's fault, so much as a bizarre and silly quirk of the Expanded Universe generally, to which the game is being faithful. So, basically, blame the people who write officially licensed fiction.