Power Conditioner. From Richard Gray for Shunyata Hydra

What sounding difference will I be expecting?
 I’ve been using RG 400 Pro for some good 15 years now and loving it. Very musical, rounded, honey sweet and never overly harsh or bright. The highs still there with good amount of micro details and, most of all, extremely reliable. 
But, is grass greener on the other side? Ive been looking and curious on Shunyata Hydra and somewhat predicting but would like to hear from others who are/were actually been there, done that. Thanks for reading.