Hi damonmcm70,
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. The name of the manufacturer on the label won’t tell you anything about whether there are any lower quality materials or weak links in the design that would affect the durability and useful life of the mattress. There is more about the risks of brand shopping in post #5 here and post #12 here. 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.
While I can’t speak to how any mattress will “feel” for someone else in terms of firmness, “comfort”, or PPP because this is too subjective and relative to different body types, sleeping positions, and individual preferences, sensitivities, and circumstances … outside of PPP (which is all about how well you will sleep on a mattress) the most important part of the value of a mattress purchase is it’s durability and in terms of durability a mattress is only as good as its construction and the type, quality, and durability of the materials inside it (which is all about how long you will sleep well) regardless of the name of the manufacturer on the label.
There are some sources for innerspring/latex hybrid mattresses listed in post #2 here and the post it links to but this is far from a complete list since many local manufacturers or retailers may also have latex/innerspring hybrid mattresses on their floor as well.
The better options or possibilities I’m aware of in and around the NYC area (subject to making sure that any mattress you are considering meets the quality/value guidelines here) are listed in post #2 here and some of them have latex/innerspring hybrid mattresses as well.
I would avoid coil counting as a way to determine the quality, durability, or value of a mattress because an innerspring isn’t normally the weak link in a mattress and the number of coils is only one of many factors that determines how a particular innerspring will feel and perform inside a specific mattress design and can be more misleading than helpful. There is more about the different types of innersprings in this article and in post #10 here but I would pay much more attention to your own careful and objective testing which will tell you how the innerspring performs in combination with the other layers and materials in a mattress and to the quality of the materials above the innerspring which is normally the weakest link in a mattress than I would to the number of coils in a mattress which by itself isn’t particularly meaningful.
Phoenix