Are the MXM4 AC tires the same as the MXM4 T0/1 OEM tires? If not, where do I get T0/1's? Discount Tire sales guy says AC=Acoustic w/foam.
Also, are these really noticeably quieter? (They're $75 more per tire). How does the noise level compare to Pilot AS4, Primacy Tour AS, and or...