Hi Anh,
With memory foam or polyfoam density is the most important factor in the durability of the foam but with latex, density is a measure of its softness/firmness not it’s durability. The different types and blends of latex will have different properties and a different “feel” but all latex is a very durable material unlike polyfoam and memory foam where lower density versions can be a weak link in the mattress (see the foam quality/durability guidelines here). There is more about the different types and blends of latex in post #6 here.
Based on “averages” it would probably be correct yes but 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 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 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.
A forum search on Brooklyn Bedding (you can just click the link) will bring up several thousand posts that mention them although many of them will be about the mattresses they used to carry on their site before they launched their new BestMattressEver. A forum search on Nest Bedding (you can just click the link as well) will also bring up some forum feedback about them as well.
Having said that (and as you mentioned) 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 may be completely unsuitable for someone else to sleep on (see post #13 here).
The only reliable way to assess the quality and durability of a mattress is by knowing the type and quality/durability of the materials inside it.
I don’t make specific suggestions because you are the only one that can feel what you feel on a mattress and there are too many unknowns, variables, and personal preferences involved to use a formula or for anyone to be able to predict or make a specific suggestion or recommendation about which mattress or combination of materials and components would be the best “match” for you in terms of PPP based on specs (either yours or a mattress) or “theory at a distance” that can possibly be more accurate than your own careful testing or personal sleeping experience (see mattress firmness/comfort levels in post #2 here).
I can certainly help you to narrow down your options along with “how” to choose and how and why to avoid the worst ones or act as a fact check or answer specific questions you may have along the way but only you can decide which specific mattress, company, or manufacturer to choose.
Hopefully you’ve read the mattress shopping tutorial here which includes all the basic information, steps, and guidelines that you will need to make the best possible choice.
Two of the most 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 choose a suitable mattress (either locally or online) 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 quality/value comparisons between mattresses in terms of suitability, durability, and value.
Once you reach step 3 in the tutorial if you let me know your city or zip code I’d be happy to let you know about any of the better options or possibilities I’m aware of in your area.
The optional online step in the tutorial also includes this link to a list of the members here that sell mattresses online that I believe all compete well with the best in the industry in terms of their quality, value, service, and transparency. They include many different types of mattresses and many of them make latex and latex hybrid mattresses that use different types and blends of latex that have a range of different designs, options, features, return and exchange policies, and prices that that would all be well worth considering.
The optional online step also includes this link to a list of the better online memory foam options I’m aware of and this link to a list of the many of the better lower budget online options I’m aware of as well and a link to posts #1 and #2 in this topic that discusses all the current online “simplified choice” mattresses (including the Love Bed and the BestMattressEver).
Phoenix