I never saw the ad on mobile, only the pic you posted here.
I just noticed, when you wrote it, that both the trunk lid and bonnet are in fact black. They could've been replaced though. The boot lid is not made out of carbon fibre, only regular glass fibre. I have the same boot lid on my Coupe quattro.
The "Edition Speciale" could have been a special model by the Swiss importer, there have been several of these around Europe, on different VAG models.
The Swiss Urqs did in fact have US-spec engines, so did Sweden. They have had quite strict exhaust regulations for more than 30 years. This means that the Urqs in Switzerland had only 160 hp from the 2144 engines. I'm not sure if they got the 200 hp 2226 MB version, this one did have a cat. Switzerland did get the 220 hp 20V.