I beleive that dynamic range is based on relatively recent driving history. It likely has not had time to 'learn you' yet. If you are trying out the acceleration and power of your new car, it will be reflected in the dynamic range.
You don't say where you are at. If you are in an area that is already seeing cooler temperatures, that could easily explain the difference... especially factoring in relatively short trips.
Tire diameter, not wheel diameter. I have the 21/22 tires. Even though the wheels are different sizes, all 4 tires have a diameter of 31 inches due to the different sidewall profiles. (21/45 vs 22/40)