Hi SON,
Brand names won’t tell you anything about a specific mattress because all manufacturers have access to similar materials and outside of PPP … a mattress is only as good as the quality of the materials inside the specific mattress you are considering (see post #5 here about brand shopping). Every manufacturer makes mattresses that use lower quality materials and higher quality materials. This also won’t relate to the price of a mattress because some “top end” mattresses include thicker layers of low quality materials in the mix that would be a weak link in the mattress in terms of durability even though some of the other layers are good quality. I would also be aware that warranties have nothing to do with the durability or the useful life of a mattress (see post #174 here).
Having said that … all of the manufacturers you have mentioned are rated as “avoid” in this article.
The only way to identify any weak links in a mattress or make meaningful comparisons with other mattresses is by knowing the type and quality of all the materials inside it … and most of the major manufacturers have little interest in helping their customers make meaningful comparisons with other mattresses because they are sold with “marketing stories” and advertising rather than meaningful information about the materials inside them.
Phoenix