CC2s fitted yesterday. Initial subjective reaction are they deffinately seem both quieter and more comfortable than the stock PS4.
I did a non scientific noise test using a app on my phone. On my way to have the tyres changed I drove a section of the A460 toward & from Cannock, approx half a mile in each direction. I did exactly the same run at the same speed with the CC2s a couple of hours later. This is a fairly rough surface well worn tarmac but I avoided all ruts & holes.
PS4: 41psi 50mph, average noise level 67.4db. The average being registered by the app, not my calculation.
CC2: 40 psi 50mph, average noise level 64.6db.
In both cases the phone lay on the central console forward of the tray & armrest.
The comfort feeling is the CC2s are softer, damping ridges & ruts better than the PS4, while driving a route of 14 miles each way I drive every Tuesday & Thursday & consists of a wide range of different surfaces including the newer super smooth quiete tarmac.