Here's my take:
The pictures of the Spoon NSX-R in Japan a month ago with the same wheels is an argument for the car not being a true NSX-R GT. But a good question would be where did Route KS (or DOME) get the original front and rear bumper to mould the RGT copies? Possibly from Spoons real RGT?
The President/CEO of Spoon said it was a real NSX-R GT, a Spoon shop car. I for one am not going to call him a tool or a liar. He did say that the RGT made the car too low for loading the car in a container and too long to fit in the container, which is why it shipped over with 02 bodywork.
It does appear that the Spoon car was at Route KS (or DOME?) For the RGT replica bodywork. IMO it makes sense to clone the RGT bodywork especially if the car is going to be tracked and risk damaging the real bumper (which did happen at the track). So, if Spoon is selling replica NSX-Rs, what's stopping you from also claiming the NSX-R seen in Japan as a fake NSX-R as well?
IMO, I too would put replica bodywork on a original RGT if I knew it would be beat up on a track in another country.
Also what is the difference (other than bodywork) between an R and an RGT? Does anyone actually know, or just want to spread more internet rumors?
All I know is that the President/CEO of Spoon said it was real ($460,000, one of 5 -2 NA, 1 3.5L stroked, 1 turboed, and I don't recall the last), it was turbo'd, the interior looked just like an NSX-R (even with the lightweight interior enginebay glass and half-mast antenna button -are their even official pics of the RGT interior?), it had the RGT bodywork (the rear bumper is the exact same as the official pics despite the photos taken not clearly showing it), and had 1-pc rotors and Spoon suspension and front calipers.