Was the Avid Acutus set up on the exact same mounting system ?
Were the same Cart's and downstream System used for both Sources ?
It would even be off interest to know if the invited to the demonstration were not specially selected for their allegiance to a Brand ?
There are practices used that are quite useful as methods of swinging a presentation favourably toward a particular device.
Sorry for my cynicism, I got out/escaped from the Dealership and HiFi Magazine Lions Den, way too many years ago, and 'did not go back for my hat'.