Originally Posted by shodanjr
The P-Zeros are a softer, high performance tire that will offer superior grip in warm temperatures. You are technically not supposed to drive them in the heavy cold since it can actually detriment the overall life of the tire (which isn't that high to begin with, my google-fu showed ~20K miles).
I assume the Goodyear is the base tire which is probably a low rolling resistance, high tread rating model for improved mileage and lifetime (I got 45K on my 08 V6) but they are not as sticky.
This is in reference to a car with the Performance Package so the goodyears won't be low rolling resistance gas saver tires.
As a matter of fact they are F1 Supercar tires, still not as good a performer as the Pirelli's.
It could be as simple as the engineers wanted a tire spec'd just for the automatic to differentiate them from the manual cars or the shift characteristics of the auto worked better with the goodyears.