I can't promise. I think they also change the firmness of the underlying foam as well. But certainly the pillow top is way too fluffy and causes that rolling baby action for sure. You might be able to experiment by kinda jumping/hopping on the bed and trying to pay attention to how much compression happens at just the top, versus the lower section. Apologies for maybe sounding a little too goofy here, but: A squishy spring attached to a stiffer spring will squish until the squish force equals that of the stiffer one, and then they'll all squish down together. So you can kind of observe if the underlying mattress will provide the stiffness that you want. If it doesn't, then there's not much you can do.
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