FE Cerabase Compact vs Stillpoints Ultra SS

I’m planning to buy Finite Elemente Cerabase Compact or Still points Ultra SS for my Esoteric K-03X CDP.

Which is better in your experience? I saw many post in some forums said the improvement is not significant by using Cerabase Compact, but I have no experience.

Should I sue 4 or 3 pieces on my CDP?

Do you think I can get good result if I use it on my power conditioner (Audience 6R-TSS), per-amp and power-amp?