Armrests would appear to be not standard on HQ Belmont Sandman. I have a production broadcast sheet here for a HQ Belmont XX7 van that has a - in box 32 (front door armrests), which means whatever was standard was fitted for the model (V8 Belmont van). Same thing is in the exhaust box. All the other Sandman series (HJ-HZ) list D14 as part of the XX7/XU3 package except HQ.

As far as I am aware all HQ Sandmans got their luxury level badges (Belmont or Kingswood), and also the engine badge for the model.

There is no mention about anything special about consoles. So either they've been changed out or there was a running change during HQ, and as Sandman is only at the end of HQ maybe that explains it.