Superlight is the faster car and if following the real cars about 50kg lighter than Supersport due to the use of lighter parts, carbon etc. Caterham doesn't use the Superlight/Supersport names anymore instead using the BHP/ton as the model 270 / 360 / 420 / 620 and S for Sport (road car) and R for Race (track weapon). AMS1 has some good descriptions of the cars in the Showroom. Although both the AMS2 cars currently have 360R decals on the dash I suspect the Supersport is a 360R (180bhp 2.0 Ford Duratec) and the Superlight is actually the 420R (210bhp 2.0 Ford Duratec) Also if you give them a run on track you'll immediately notice the performance difference, for example, my times @ Brands Hatch Indy: Superlight: 51.994 Supersport: 56.969 Hope that helps
