One more datapoint for you - I did some detailed analysis back in 2017-2018 on Sense recognition of my AC units vs the data from my Ecobee. I chose to do this because my 2 AC compressors had blossomed into 5 different device detections, and I wanted to try to correlate the Sense devices vs. the cooling commands from my two thermostats. I’m not going to try to describe all the details, but what I found was that which device each my compressors was identified as, varied depending on the month in the cooling season.
I haven’t done the analysis recently since I installed a new Sense in April and am installing a new AC systems today, both upstairs and downstairs.