I'm strictly a 1st Gen. (and 5th) fan. So I don't know much about the 2-4 generation Camaros. But, my general impression of the older Camaro models is:
Z28 = road race
SS = bad ass
RS = deluxe trim
Just my opinion. (from someone who owns a Camaro with a 327, "aftermarket" Z28 stripes, and no badges)