do all the s come with sideskirts too? coz if i remember well my mate's '96 s hadn't. also the s doesn't come with discs on the rear.
and as said the V is turbo and S is just an na version. withe a few minor diferences, bonnet bulge, no rear discs, no boost lights on the rev-counter ect
with a few of the right mods everything can have more power