Hi Adianez,
I’m assuming that you are referring to the SleepEZ 7" Natural Select here in your finalists which is listed at $1377 (not 1477).
Outside of the firmness of the latex and the options you have to rearrange or exchange the layers (or add to them) and their return policies … the Cozy Pure and the SleepEZ mattresses you are considering are very similar in terms of the type of materials and components (they both contain 6" of natural latex and a wool quilted cotton cover). The Cozy Pure cover is also quilted on both sides and can be flipped while the SleepEZ cover is quilted on one side of the cover.
The Pure Echo is a completely different type of mattress that uses a pocket coil with natural cotton comfort layers and an organic cotton cover quilted with Joma wool so it can’t realistically be compared to a latex mattress in terms of how it feels (cotton and wool feel very different from latex foam) or its firmness.
All of these manufacturers are members of this site which means that I think very highly of all of them and I believe that they all compete well with the best in the industry in terms of their quality, value, service, and transparency. All of these mattresses use high quality materials and there are no lower quality materials or “weak links” in any of them in terms of durability.
You can see some comments about convoluted foam layers in post #2 here. Basically it will “act” softer than a solid layer of the same type and blend of latex with the same thickness and ILD.
A forum search on any of these manufacturers will bring up many comments and feedback about all of them (you can set the “find posts from” option to “any date” to bring up all the posts in the forum that mention them).
Having said that … I would be very cautious about using other people’s experiences or reviews on a mattress (either positive or negative) as a reliable source of information or guidance about how you will feel on the same mattress or how suitable or how durable a mattress may be for you and in many cases they can be more misleading than helpful because a mattress that would be a perfect choice for one person or even a group of people may be completely unsuitable for someone else to sleep on (see post #13 here). It’s also very unlikely that any of the forum members have tried all (or even two) of the mattresses you are considering to be able to compare them.
I would also keep in mind that there are no “standard” definitions or consensus of opinions for firmness ratings and different manufacturers can rate their mattresses very differently than others so a mattress that one manufacturer rates as being a specific firmness could be rated very differently by another manufacturer. Different people can also have very different perceptions of firmness and softness compared to others as well and a mattress that is firm for one can feel like “medium” for someone else or even “soft” for someone else (or vice versa) depending on their body type, sleeping style, physiology, their frame of reference based on what they are used to, and their individual sensitivity and perceptions. Different people can also have very different opinions on how two mattresses compare in terms of firmness as well. This is all relative and very subjective and is as much an art as a science. There are also different types of firmness and softness that different people may be sensitive to that can affect how they “rate” a mattress as well (see post #15 here).
When you can’t test a mattress in person then the most reliable source of guidance is always a more detailed phone conversation with a knowledgeable and experienced retailer or manufacturer that has your best interests at heart (and all of them would be in this group) and who can help “talk you through” the specifics of their mattresses and the options they have available that may be the best “match” for you based on all the information you provide them, any local testing you have done or mattresses you have slept on and liked that they are familiar with, and the “averages” of other customers that are similar to you. They will know more about “matching” their specific mattress designs to different body types, sleeping positions, and preferences than anyone else.
When you are down to finalists that are all choices between “good and good” and none of them have any weak links or lower quality materials or “weak links” in their design and if there are no clear winners between them then you are in the fortunate position that any of them would likely be a suitable choice and post #2 here can help you make a final choice based on your local testing or mattresses you have slept well on, your more detailed conversations with each of them, your confidence about PPP and the suitability of each one, their prices, your preferences, the options you have after a purchase to fine tune the mattress or exchange or return the mattress or individual layers, any additional extras that are part of each purchase, and on “informed best judgement” based on all the other objective, subjective, and intangible parts of your personal value equation that are most important to you.
Phoenix