But if the GISO GB has all pins connected whether they are needed or not and the GISO DS only has the minimum necessary, then the DS will potentially be injecting less unwanted noise into the audio chassis than the GB will it not?

Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).