Interesting question. My intuition says springs on springs would make for interactions and very different resonant frequences which sounds like a bad thing. But I don’t know the physics in great enough detail to be able to say for certain and I have never tried it.
The only thing I can say for certain is my sprung Linn LP12 benefited greatly from the Silent Running Audio Ohio Class platform I had made for it. That platform does not use springs. Great combo. Unfortunately it costs sbout the same price as the table.