If I look at Aleph’s post the grey backgrounds are obviously different. Darker on RT. The lady is “hotter” on the RT shot, probably more natural and the hair tint is more obvious. Put all together and the processing is entirely different.
When I set a camera profile in RT I have to navigate to it. Not noticed any auto selection.
As I mentioned Canon’s software will very probably be using one of the curves that it uses to map raw into the camera jpg’s. Most cameras have several of them - settings such as landscape, portrait, high key and even diy on on some cameras. RT wont have done that and adjusting colour temperatures to fix the difference wont be the correct way to obtain the same results. It’s the equivalent of using one of RT’s curves panels.
Personally I always set camera white balance to auto and stick with it through out unless I can see good reasons to change it manually during processing.
According to DisplayCAL using either monki display or photo my max de on that shot is well under 1. If it had a bright white in it that could reach 1.5.