Pwr.Con Comp -Hydra 8/RSA Jasco/ Sound App. Ref

Has anybody tried comparing these 3 power conditioners and if I could get feedback, on which performs best.
I do know that Sound applications Reference is twice the price, but is it worth it?
Running Spring Audio-Jasco or Danielle, Vs Shunyata Hydra 8, vs Sound Application's Reference PC.