I have the Oreas under my Turntable platform. They do some isolating but mostly dampen vibrations. Works good for my Sota turntable. (Putting a second set of spring footers under a Sota is not a good idea. The double spring system would be unstable.) I tried the Nobsound footers both directly under my preamps and DAC and on platforms that the preamps and DAC sit on. I found that better because the feet on my equipment are designed to dampen vibrations. You can see them on my system page.
Remember to tune the footers to your equipment by using as few springs as possible for each footer. If you are in-between- ie one less spring is too little and one more spring is too much, don't be afraid to add a mass to your component to increase the load. The lower the spring rate, the lower the natural frequency of the system. Fewer springs gives a lower system spring rate. Lower is better. And the higher the mass, the lower the natural frequency.