I once had all my two channel components mounted atop oreas or isopucks. Biggest improvement was heard with oreas between my Harbeth SHL5+ speakers and their stands. Without them the characteristic Harbeth enclosure resonance was easily felt with my hands on the stands. With the oreas under the speakers there was zero vibration transmitted to the stands. Subjective performance improvement was a tighter sound presentation particularly among the lower frequencies.
I felt that most of my components sound was improved, or at the very least, not harmed with IsoAcoustic isolators beneath them. Regarding the differences in apparent performance between isopucks and oreas, there was none that I could ever discern. The orea do look “prettier” though which I guess falls into the pride of ownership category.
After migrating to a dedicated headphone system I sold most of my isolators. The only components I now have are oreas under my DSD DAC and Stellar P3 PP. Not sure why though as I no longer have speaker generated sound waves bombarding my components. And I don’t have any under my four headphone amps. Not enough external vibrations to justify their continued use, but I think I just feel comfortable knowing they are protected against the potential vibrations of barking dogs, passing garbage trucks, school buses and auto boom boxes, sonic booms, earthquakes, meteorite impacts, etc. After all I still am an audiophile. Hmm… maybe I should get some for my headphone amps?