The white does look a bit naff. The black would be nice. Through Europe there were originally 4 colours available, all left hand drive. Only the darkness grey was available in the UK. I notice that the example doesn't have that little ABT on the rear left hand side and is second hand, and is more expensive than mine, unregistered!!!!
On the valve issue.... then why is the exhaust tone completely different in Cupra?..... are they over feeding fuel in order to get the snarl noise? It is a party piece of the car to switch modes and listen to the change in the exhaust noise, right from tickover through to overrun.
For the UK the first ones only came in Blackness Grey, if you wanted the other colours you had to wait. Not sure why Seat UK did that, but you could always have the other colours if you were willing to wait. But UK didn't get the matt grey I think (same with 5 door).
Unlike the Cupra R 5 door, the Carbon Cupra R ST is not a limited edition, just a different model you can order. That's why you don't get a No XXX of XXX on your internal trim. However like the Carbon, Seat UK only decided only to bring a set number into the UK to give it some kind of exclusivity. For the carbon it was officially 50, although some say only 42 actually came across in the end.
As for the price on the white one, who knows?!
As for the valve. You have a soundactuator and change to fueling. Soundactuator is a speaker like device in the engine bay that makes the car sound louder (turned mine off). The fuelling is more to improve throttle response when the gearbox in sport mode. So that's why you get off throttle pops and bangs (depending on how loud your exhaust is/isn't).
So yeah no valves.