Hi 1whithorse1,
I remember … and you’ve certainly had your share of difficult experiences.
You may have read this already but just in case Post #2 here and the more detailed posts and information it links to have more information about safe, natural, organic, “chemical free”, and “green” mattresses and mattress materials that can help you sort through some of the marketing information and terminology that you will encounter in the industry and can help you differentiate between them and answer “how safe is safe enough for me” so you can decide on the types of materials you are most comfortable with having in your mattress. These types of issues are complex and are generally specific to each person and their individual sensitivities, circumstances, criteria, and lifestyle choices. Latex can certainly be a good choice for people that are very sensitive.
I would also make sure that you’ve read the mattress shopping tutorial here which has all the basic information, steps, and guidelines that can help you make the best possible choices … and most importantly know how and why to avoid the worst ones that you purchased.
Two of the more important links in the tutorial that I would especially make sure you’ve read are post #2 here which has more about the different ways to buy a suitable mattress that is the best “match” for you in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) that can help you assess and minimize the risks of making a choice that doesn’t turn out as well as you hoped for that are involved in each of them and post #13 here which has more about the most important parts of the “value” of a mattress purchase which can help you make more meaningful comparisons between mattresses in terms of suitability, durability, and value.
There is more about the different ways that one mattress can “match” or “approximate” another one in post #9 here but unless the type and blend of latex and all the layer thicknesses and firmness levels are the same in both mattresses and they both have a very similar cover then the only reliable way to know how one mattress would compare to another one would be based on your own side by side testing (with either no or very little time in between because our memories for something as subjective as firmness or the “feel” of a mattress isn’t very long lasting). Even smaller differences between two mattresses can make a surprisingly big difference for some people and when you have two mattresses that use different materials or designs (or the types and blends of latex are different) it’s really not possible to know how they will compare for you unless you compare them in person.
I don’t know the detailed specifics of the mattresses that Dormio carries but if you know all the specs of the Acadia 4.0 that you tested (including the ILD of the layers and zones that you tested) then Dormio would be your best source of guidance about which of their mattresses would be the closest approximation based on specs because they will be much more familiar with their mattresses than I am.
I would also be very cautious though about using another mattress as your “target” because it may not be the best possible match for you in the first place (and you could end up excluding another mattress that may be different but could be a better choice in terms of PPP) and because human memory for softness, firmness, and “feel” is very unreliable and a mattress that may feel similar to what you “remember” another mattress feels like may end up being very different. I would rate every mattress you consider against a common set of criteria (rather than against another mattress) using the testing guidelines in the tutorial post and based on which one is the best “match” for you in terms of PPP and all the other parts of your personal value equation that are most important to you.
Phoenix