This innerspring unit is essentially the same as the Superspring only this time each individual coil is wrapped. This was done by the mattress industry some years ago for two reasons. One of them being with each coil wrapped in its own fiber casing, this cut down on the reverberation from the springs making it a quieter sleep with no sound from the coils. We never did hear the superspring make any sound but the coil wrap theory sounds good. And the other advantage is with each spring in its own case, after years of use "spring sway" is greatly reduced over time. This means that the coil has a greater likelihood of staying in place overtime when it is held within its own casing. So there you have it.