You're right Nick the car at the Nurburgring is an S Zero but the car at the start of the first video (at Tanaka circuit in Japan) is a "regular" Type S.
This actually a 3 part video and I'd posted sections 2 and 3. The first section is here... https://www.youtube.com/watch?v=h7FRwuq2krA
VTEC say the car is from Honda R&D, which I think is in Germany (fro Eurpoe), not HUK so there may be more to the story. There's no question the car is exists and is currently in the UK unregistered. I wonder what happened to the black Type S (wearing P888 RAM) Gan San is tooling around Switzerland in?
Cheers
Mark