I think it's all silicon hardboard. There are a couple with a battery/capacitor and a very small RAM chip for savegames but for the most part theyre solid.
SWC was basically WC1, SM1, and what some people refer to as SM1.5, where the Claw hunts down and destroys the shipyard the Sivar dreadnaught was made in.
Some of the ship graphics were different (and later brought over to Armada to represent different ships), but basically they flew like their PC counterparts (talking strictly about handling characteristics, here, and not the comparative flight controls).
All I can say is that it's a darned pity they never made it for the PC (the IBM-compatible PC, to be precise). I guess the next time I'm in Poland, I'll have to spend a... few... hours at my neighbour's house, since he has SWC