I measured other EPV's feet against other isolation/decoupling, none of the "foam" based come close to spring based feet. From Nobsound to Seismic Isolation pods and podiums do a much better job decupling and isolating that any of the of the foam-silicon-rubber mechanism, including the IsoAcoustic Orea and any of their products. I wish there was a way to put pictures here so I can show you, measurable, repeatable and reproducible test results.
If you know how to post pictures, let me know how. I have done RT60, decay, and other analysis with REW measurements.