Yes, the original audio files might be different. However, I don't think that the cutting master differs from the rip, provided proper works are done through the production and ripping line.
FYI
As you may know recently I've proved that PS3 SACD ripping method is bit perfect. When we were having a PS3 ripping issue with the Guano Apes SACD on another forum a DSD capture was done through playing / capturing the DSD audio stream of this SACD on a modded Pioneer DV-989 DVD player...