Hi jadespider,
Thanks for providing the results of your chat with Christeli. Those specifications don’t line up with what they provided me, so I’ll double check to see if I made a mistake. Thanks!
The Cloud Supreme would be best described as a “soft” mattress in the Tempurpedic lineup. It uses 1.2" TEMPUR-ES 4.1LB memory foam on top of 2.75" TEMPUR Material 5.3LB memory foam. The support system consists of a 3" polyfoam base at 2.0LB on top of a 5" polyfoam base at 2.0LB. As you’re aware, the Palais Grand Royale uses different materials in a different arrangement, most notably the use of a latex core (versus polyfoam in the Tempurpedic). I don’t know that testing the Cloud Supreme would be a very accurate comparison to the Palais Grand Royale (Christeli compares it to the old Grandbed (more in features than feel, I believe), which also didn’t have latex in it). Christeli will be the first one to tell you that their models don’t imitate Tempurpedic (or any other brand), as their mattresses use slightly different materials and won’t feel identical. The comparisons are best used as “references”, and they say their Madeline is a closer “comparable” item to the Cloud Supreme. I know that for some people shopping in-store is preferable for something that can be so subjective like a mattress.
Per Christeli: You can use your existing box spring if it’s in new condition. You can also place your Christeli mattress on a platform bed, the floor or a slatted bed frame — just make sure the slats are no further apart than four inches. If they are indeed wider, you can use plywood or a bunkie board.
There’s more information about appropriate foundations for latex or memory foam mattresses in the foundation thread here.
These are very different items. The Beautiful is an all Talalay latex mattress (no memory foam at all) and the Reverie uses their Dreamcell latex “springs” combined with latex and memory foam – again, a very different item, and not something that would at all be “comparable” to the Palais Grand Royale. There is more information in post #9 here about the different ways that one mattress can “match” or “approximate” another one. Every layer and component in a mattress (including the cover and any quilting materials) will affect the feel and performance of every other layer and component and the mattress “as a whole” so unless you are able to find another mattress that uses exactly the same type of materials, components, cover and quilting, layer thicknesses, layer firmnesses, and overall design (which would be fairly unlikely) then there really isn’t a reliable way to match one mattress to another one in terms of “comfort”, firmness, and PPP (Posture and alignment, Pressure relief, and your Personal preferences) based on the specifications of the mattresses (even assuming that you can find out all the specifications you would need for both mattresses you are comparing in the first place). Especially in this scenario, as these two items are quite different from what you’re considering and you could only rate them on the comfort that they specifically provide.
Phoenix