We have SRA platforms here at the shop as well. I like them a lot. Since they have their own suspension you really don't have to worry too much about what you place them on. My impression of the SRA platform is that its meant as you say to isolate the equipment from vibration. I found that the SRA helped even if you don't use points between the equipment and the platform, but it seemed a bit better when we did.
Anytime you see isomeric devices used, they are performing the work of isolation. A friend of mine who is a mechanical engineering professor at the UofM gave me a lesson on that topic years ago when I was assisting him mounting a Norton engine back into its frame (the Norton Commando 850 engine was isomerically mounted).
My old Scully lathe had a table that used a platform with isomeric footers that engaged the table. The platform used dissimilar materials to reduced vibration and had cutouts and footers attached to mount the actual lathe and its cutter drive transmission. Obviously they were very concerned about how vibration might affect the final product! Ampex used isomeric mounts on their circuit boards in their famous 351 tube record electronics (to reduce the effectsof microphonics); while isomerics always will dissipate some energy, their primary function is always isolation.
