That's the thing, if a the carcasses are the same grade, then there's no difference
We have had purebred Angus and Hereford calves as well as crosses of the two processed and absolutely no discernible difference in taste or quality, all have been great. We prefer to process red calves and sell the black ones because the cool aid drinking people think the black hide cattle tastes better.
The meat we get from our calves regardless of hide color is far and away better than any of the choice "Angus" labeled beef at the grocery store.
It is my belief that the feeders and packers are basing their biases on the types of cattle from years ago. Carcass quality has been and is bred for in most breeds.
If anybody listens to the Angus supporters they'd have you believing that no other breed of cattle was fit to eat, and that is just not reality.
I like the CAB product, have nothing against Angus cattle and have several friends that are Angus breeders, but I don't go along with the scorched earth marketing that is based on continually discrediting the competition.
The folks where we take our cattle to be processed have thus far always been complimentary of how our calves are finished and how the end product looks.