You should test each component individually with both units. I have found the Premier generally improves things but specific components could prove to be an exception.
Power Plant Premier vs. Hydra V-Ray Comparison
I want to buy a power conditioning system and I would like to understand which would be a better performer - the PS Audio Plant Premier or the Shunyata Research Hydra V-Ray. As they take a very different approach to solving the same problem it is hard to understand which will have a better result. Anyone had real experience comparing these two?