Hi Yoksel,
Unfortunately … most of the time you spend testing mainstream mattresses (or any mattress for that matter where you can’t find out the specific quality of the materials inside it) would be wasted unless you actually intend to purchase the mattress and I certainly don’t recommend buying a mattress where you would be making a blind purchase and the odds are high that it either uses lower quality materials inside the mattress or that it has poor value.
Without knowing what is inside a mattress there is no way to make an informed buying decision or have any idea about its relative quality or value and you will end up becoming more and more frustrated trying to make comparisons that aren’t possible.
You can read a bit more about trying to “match” or “approximate” another mattress in post #2 here but since you don’t know the specifics of the materials and there isn’t another manufacturer I’m aware of that uses any of the Simmons mattresses as a design “target” or would try to approximate it … you would only be able to match it in terms of its subjective “feel” in side by side testing. If there is too much time in between two mattresses you are comparing then even this wouldn’t be very accurate, is only subjective at best, and isn’t likely to translate into what you feel when you sleep on the mattress at home. Most people have had the experience of testing mattresses over he course of a day and going back to re-test some of the ones they started with only to discover that they now “feel” very different because of the perceptual “influence” of the other mattress that we’ve tested.
Matching by “feel” also doesn’t tell you anything about the relative quality or value of two mattresses because you can’t “feel” the quality of a material in a showroom. Without knowing the quality of the materials in the mattress … you will only find out that a mattress used lower quality materials when it softens or breaks down much too quickly and you lose the comfort and support that was the reason you purchased it in the first place (and the loss of comfort and support that leads to the need to replace a mattress isn’t covered by warranty).
I personally wouldn’t spend any time even testing mattresses where you aren’t able to find out what is inside it unless it is directly comparable to another mattress you are considering purchasing and a manufacturer you are dealing with is familiar enough with the mattress that they can confirm that they are close approximations in terms of “feel” and performance.
In almost all cases there would be many alternatives that would be just as suitable in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) where you can validate that the mattress uses good quality materials without any “weak links” and has good value.
Phoenix