I don't know which is better, ERS Paper or Magix. They do similar things, they change the brightness into transients. Magix does something else also, it makes the frequency response flat, smooth and open.
I have my main transport (Cary 303/300) on top of Magix levitation feet, and my computer on top of Feet of Silence. I was hoping to replace the Magix with Feet, so that I could try mass damping my amp.
Changed Magix to Feet under Cary: White and edgy transients. Bigger and boomier bass that is muddy. More oomph in the bass but it is fake and fatiguing. Darker and whiter, fake dynamics. Doesn't sound clean, flat or open. Low-level details are covered up with muddiness and darkness. Attack and decay is missing, transients sound sharper and brighter.
Added 3 books on top of DAC1: Bass is bigger. More clarity and blackness. Everything is bigger, the sound signature of Feet for transport is more apparent now.
9 books on top of DAC1: I'm not sure it made a further improvement. Maybe bigger and fuller bass with less boominess apparent.
Went back to 3 books.
Added 6 books on top of Premier Power Plant: Subtle improvement at best. Maybe smoother with more detail.
Removed Feet from Cary and used the built in cones: More open. Less whiteness and blackness. Empty, dull and flat. Brightness is masking openness and detail. Brightness is very fatiguing.
Added Feet + metal plate + Feet for Cary (bottom Feet in different positions): Boomier bass and more oomph than single set of Feet. Maybe little whiter also. Metal plate was bent in many positions, see picture below.
Bottom Feet in same position as top Feet: Less bass. Duller and flatter.
Removed 2nd set of Feet: Same as above, maybe little worse.
Removed all 3 books from DAC1. Removed 3 books from Premier, kept 3: Boomier, muddier, duller, smoother. Less detail. Brighter with less clarity. Everything is thinner.
Changed Feet to Magix under Cary: Quieter background. Smoother and more open, easy to get lost into music. Muddiness is gone, it sounds cleaner and flatter with more detail and true dynamics. The whiteness has been replaced with sharper and smoother transients, there are more of them, they are hairy. There is much longer attack and decay, it sounds very full and smooth.