If my memory serves me right, the P6000s were rather soft, and provided more comfortable ride as a result.

A lot also depends on what tire pressure you're running.

you don't want your tires to be hard as rocks, because then they will not flex at all and may put strain on the rims anyway.

I'm running mine around 38-40 PSI cold, but it depends on what size you have.

Since every little bit helps.

I wouldnt say a huge diff, but I do favor the S03s overall, this would be another reason! :)