Sorry for the late reply just got back from a 10 day vacation. So glad to be home now.
Not more info in differences than I have already stated comparing it to the CTT. Just to elaborate more on what has been said, the CTT was only luxurious in its amenities which were better executed than the RR (infotainment, nav, Burmester stereo, ventilated seats, switching radio stations, etc). But the ride quality of the CTT is not luxurious, it had loud wind noise and at low speeds had a suspension whinning sound that was annoying. No SUV comes close to the steering feel or handling of the CTT that has PDCC in it. The CTT has major turbo lag without some mods.
The RRSC rides so freakin smooth and quiet, it really oozes luxury. It just feels so special to drive it. I already stated that the performance is barely off the mark from the CTT. It just overall feels like a much better option when wanting an SUV for me. Prefer ultimate sportiness to a sports coupe and luxury and compabilites from a SUV.