How is the soft Posturepedic Plus different from the medium version?

Same 1,200-coil Posture Grid core and cooling stack, different surface feel. This soft model has a deeper 6-inch comfort layer for a plush, sink-in feel best suited to side sleepers, and it stands 15.5 inches tall. The medium version is firmer at 5.5 out of 10 with a 4.5-inch comfort layer, suiting back sleepers and combination sleepers who want more support on top.

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