Well..
WC1 had very much the same style as WC2 except for a few *slight* changes (no more stupid space-ejection jeans and leather jackets, but still the motorcycle helmets) but when I first tried WC3, it was *woah*. That shift was REALLY different. It got rid of the quiet look of the 'claw. Personally, I liked the "green" look of the wc2 and 1 ships, because it made it so much more "WW2".
Anyway, notice how some parts of WC=WW2. Kats launch surprise attack on Sol (after fake treaty), destroys lotsa fleet, then, a lone craft moves in and takes out their planet with one bomb, ending the war, and forcing the cats into only having a non-agressive and very lightly armed defense force (if that.) And, there are still kitties (cult of sivar) fighting after a while like there were still japanese guys out in the 1970's on islands fighting.
Oh well, another partially off-topic post.