Do you have personal experience with the PS4/PS4s difference? I am curious if there is a huge jump to the S.
I can only talk to my own experience.
Personally I have cars with PS4, GY Assymetric 5, Assymetric 6 and GY SuperSport.
I hate the PS4. They're made in China.
The Assymetric 6 were cheaper than PS4 and are made in Germany and are a beautiful tyre. They are on a BMW M Sport and compliment the car beautifully. Rim protection is great and the car is unflappable.
The GY Super Sports are on the 3.0R Spec B and are wonderful and handle superb, however I recommend the Assymetric 6 is the better road tyre due to wear and wet weather performance.
Just looking at the premium to go from GY the PS4S I personally don't see the merit given how happy we are with the GY products.
A direct comparison would be PS4 to Assymetric 5. I bought Assymmetric again. It has better rim protection, made in Germany, better steering response and sportier more nimble handling.
For street car I wouldn't look at the GY SS or the PS4s. Unless autocrossing.
There is a good Continental the UC6 which are on my parents car a Mazda SP23 which have done well.