My continued opinion is that as the Leaf Plus and M3 SR+ both use the same tire model, they should be at the same PSI for the test.
The 3.4 miles per kilowatt hour felt a little low for his test, so going to run my own in a couple days and compare. Admittedly, between tires, minimal pro-pilot, minimal climate, and nearly full use of reserve those might get up up .3-.4, which is where I expect to get.
2019 S Plus (98.06% SOH) & 2019 SV Plus (94.77% SOH) Both Silver
2013 Leaf SV sold 2019 with 11 bars
100 Mile Club Member (Number 87)
Max Miles on 13 Leaf: 120 miles
Max Miles on 19 SV+: 242 Highway miles @ 4.5 miles/kWh