Hi Wombat207,
I would be very cautious about brand shopping in general because you are buying a specific mattress not the brand and all manufacturers have access to the same or similar components and materials. Many manufacturers make a wide range of mattresses that can vary from lower quality and less durable materials to higher quality and more durable materials in a wide range of prices. The name of the manufacturer on the label or the price of the mattress won’t tell you anything about whether a specific mattress is suitable for you in terms of PPP or whether there are any lower quality materials or weak links in the design that would affect the durability and useful life of the mattress (which are the two most important parts of a “premium” mattress purchase). There is more about the risks of brand shopping in post #5 here and post #12 here.
When it comes to the quality and durability of a specific mattress I would focus much more on the type and quality/durability of the materials inside a mattress (which are important to know anyway) than I would on the name of the manufacturer on the label.
Again … there is more information about the 3 most important parts of the “value” of a mattress purchase in post #13 here which can help you make more meaningful quality/value comparisons between mattresses in terms of suitability (how well you will sleep), durability (how long you will sleep well), and the overall value of a mattress compared to your other finalists based on suitability, durability, and all the other parts of your personal value equation that are most important to you (including the price of course and the options you have available after a purchase to fine tune the mattress or any exchange/return options that are available to you).
You can also read more about the properties of a “perfect” mattress relative to any particular person (and a mattress that is “perfect” for you is the only definition of “premium” that really matters) in post #4 here and in post #2 here.
Phoenix