My beloved 2018 Model 3 was broad-sided the other day, so all of a sudden I'm in the market for a new one. I noticed that the acceleration and battery range for the 2021 Long-Range AWD Model 3 are 4.2 secs and 353 mis, but the 2020 used cars of that exact same model for sale on the Tesla website show 3.9 secs and 322 miles. Does anyone know why the differences from one year to the next? Thanks.