Met and talked with the owner on Saturday. It appears to be a faithful re-creation of a Turbo-RS. Saw the engine bay and it's immaculately done. The engine is from a 944 as it should be if it were a true RS. He said it's an S2 engine that's been turbocharged.
I would like it better if he had selected the Speed Yellow or Red for a Turbo-RS. Regardless....very nice owner who has clearly put a lot into the car. While I was there, they fired it up and left......sounded fantastic.