Ah, finally a real response!
My goal was to work up a basis for each race, and then differentiate them from there. Weaponry is going to be one area where they are quite different, though I have not gotten around to it yet.
A lot of things have to be looking like just duplicates of each other because that is necessary for the basics. How many ways can you make a ship bridge, after all?
Have you looked at the latest Versions? The races now have vastly differing ship sizes, so that is going to make a difference right there.