Damn the car is very similar looking to the regular 430. The challenge wheels and the challenge rear grills are available options on the base 430. Thus it looks the exhaust pipe location is the only give-away that this is the CS.
In the 360 Modena and stradale, the key differentiators were the extended front fascia, CF mirrors and rear spoiler. Looking at an incoming 360 from a distance it was difficult to make out if it was a CS until you could the see the mirrors. But this looks like a piece of cake compared with identifying between a 430 and 430CS.