The ZXS came out around 1996 in very few numbers just for the Japanese market and the Evo came out around 2001 again in very few numbers the evo had the blue steering set up and an alloy front kick up section to the cabon chassis where the ZXS had a 1 part carbon chassis, the original ZXS also had Yokomo YZ10 style wheels and hubs (the type with the 2/4 screws to hold the wheels on) other that that i'm not 100% sure as i don't have my ZXS any more but i know Welshy who comes on here still has it along with a couple of ZXS Evo's so he might be able to tell you a little more
Any pics of your ZXR Jason?
I'm a bit of a Lazer collector and i have a New Built ZX, NIB ZXR, ZXR-R, New Built ZXS Evo and the ZX5
