After roughly 17,000 miles on each set of tires we are seeing a 6% hit to efficiency from the Pirelli P7 AS+ 3 compared to the OEM tire. Both sets were put on in August of 2022 and 2021, respectively, so very similar seasons, weather, and commutes.
8/8/2021, took delivery of Model Y with OEM Continental ProContact RX. By 6/1/2022, we drove 17,016 miles and averaged 252 Wh/m.
8/13/2022, replaced tires at 21,666 with Pirelli P7 AS+ 3. As of 5/20/2023, we drove 17,048 miles on this set and averaged 267 Wh/m.
The Pirellis do seem to be wearing/lasting better. I rotate tires every 6K miles and by the second rotation had the following tread depth left:
OEM tire: F 7/32nd, R 5/32nd
Pirelli: F 8/32nd, R 7/32nd