First time post for me on Bitog.
I just installed the new Michelin Pilot Sport 4 AS tires on my 2017 Mazda GT. Noise doesn't seem to be an issue I'm experiencing.
Prior to the new Pilot Sports 4's all seasons I had the Michelin Pilot Sport AS 3+ and the 4's are much quieter on the Mazda. The 4's feel a tad bit softer in ride, quieter and handle just as nice. However, they are new rubber and the tread pattern is completely different from the Michelin Pilot Sports AS 3+ .
I've only put about 500 miles on them, but so far, I really like them for their ride comfort, noise, stability and wet/dry grip levels.
They feel like a more mature AS3+ if you have them now