OK, this took some time but I made 4 RCCD's: One of the black CDR's was Nespa'd before making the copy, one was never Nespa'd the 3rd was Nespa'd before and after and the 4th Nespa'd only after it was RealityChecked! Got this so far. The best sounding of all was the one that was Nespa'd after it was copied via the RealityCheck process. Nespaing (a new word now) a blank CDR before it was copied, did not have the openess and bass control that a copied RCCD/Nespa CD had. This was not subtle.
Still, as in my previous posts, I'm enjoying just zapping each CD with the Nespa unit and forgoing using the RCCD process, yes it's better doing all but the difference and time it takes is just not worth it, IMHO, yours may differ, or you have a lot of free time.
Enjoy, hope this has helped.