I finally got a chance to get my CC2 installed on the Model Y. I had around 21,000+ km on the OEM Conti, and so far, I drove about 30km on the CC2s, so my opinion may change.
My initial impression is that compare to Conti at 42psi, CC2 at 42psi does NOT feel any harsher. It may even feel little softer, which is what I want. Noise though, is slightly higher but not to the level that would bother me.
As for the efficiency, I can see there is a slight drop, but may be 5% max, on the exact same road trips. I do have TeslaFi recording every drive, and since it records temperature and average speed for each trip, it's relatively easy to compare the equivalent trips.
Probably after about 100km or so, I may boost up to 44psi and see if that makes any difference.
So far, so good.
Unless someone develops a dedicated all-weather tires for EVs, I may stick with CC2.