A run flat rated less noisy than a non run flat?
Run flat have very stiff sidewalls, but they are generally too stiff and actually reduce handling. This is one of several performance design compromises so they can run flat. Also, the compounds are typically noisier than a non run flat tire. For these reasons, I cannot believe there are any run flats that outperform the PSS.
There's a reason many sports car drivers refer to them as runcraps. Unless you just don't want to have to change a tire on the side of the road, there's no reason to use them. I like my family members to have them, but I'm perfectly fine changing a tire myself.