Hi Koeppl,
Welcome to the Mattress Forum!
I’m happy the information presented here has been useful to you.
The change in feel could be for many reasons, including, but not limited to, the actual makeup of each mattress (they may not be the same models), the age of the floor model mattresses (foams soften with use), the temperature of the showroom, the base under the mattress, the clothes you wore when testing each mattress, your ability to recall feel from one store to another, and so on. Density is not necessarily the determining factor of the softness, recovery and temperature sensitivity of memory foam. It is independent of the softness, and that is determined more by the isocyanate/polyol formulation. The properties of memory foam will have more to do with its chemical formulation than with its density and different memory foams with the same density can have very different properties and “feel” (see post #9 here and post #8 here). In addition to this … the thickness of each layer, the softness of each layer, and the order they are combined together will all affect how a mattress feels and performs or how well it may “match” another mattress. There is more about the different ways that one mattress can match another one in post #9 here.
The changing of the warranty had nothing to do with new models. I applauded this action by Tempurpedic to shorten their warranty, as did others within the industry, as being more realistic of a timeframe to provide protection against warranty defects. The length of a mattress warranty and the quality and durability of the product have nothing to do with each other, and too many mattress manufacturers place unreasonably long warranties on products, as they know the general public erroneously equates a longer warranty with a higher quality product.
If a store had a model out on their floor for three years, that would be unrepresentative of what a new mattress would feel like, and might not even be a true representation of the current line up, as Tempurpedic, like all manufactures, make frequent changes to their mattress line ups and designs.
I don’t believe that your assumption that the two items are the same is correct (“equivalent” does not mean the “same” with mattresses), nor would you be able to make that assessment with either the information you linked here or with the information you’d be provided at places like Direct Buy. What you need to learn about a mattress to make a logical comparison is listed here, the most important being foam layer density, and that is not information that Tempurpedic generally shares. You would need to know the exact layers, their thickness, their order, and their density to begin to make comparisons. Using “weights” by themselves is not a way to compare mattresses as well, as they are not always reliable, and some weights can be for the product including packaging, versus the weight of the mattress itself.
I think you’re making conclusions based upon very incomplete information. As I mentioned earlier, Tempurpedic, like all brands, is constantly changing the makeup of their products. They still do use some good quality memory foam in their mattresses, and you can go to Jordan’s web site to see the actual densities they use. These are items in the United States, so you will find different offerings in Canada.
Tempurpedic mattresses use good quality materials but as you know they are in much higher (and mostly unjustifiable) budget ranges and for most people they certainly wouldn’t be in the best “value” range compared to many other smaller manufacturers that use similar (or in some cases better) quality materials that are in much lower budget ranges. You can read more about Tempurpedic in general in posts #1 and #2 here.
Phoenix