[Jessie]

Good review comparing the DWS06+ and the PS A/S 4 (and few others).
Look for the tables comparing the tires at the end of each part.

Based on this review and some others the PS A/S 4 is better in dry while DWS06+ better for wet.
I live in south California and picked the PS A/S 4 a couple of weeks ago.

 

[Jessie]

How is the road noise, and ride quality?

The ride quality and grip are noticeably better than the OEM tires.
For noise, didn't pay much attention to it so I would say the same or better than OEM (OEM tires didn't bother me too).
Cant tell how they compare to the DWS06+.