Hey Endymion,
Thanks for the kind words and happy to hear you found the information helpful .
This is a good question, Endymion, and one that receives some lively debate with regard to individual “feel” in personal preferences/ ppp. Latex foam is generally made using one of two different manufacturing methods, the first known as Dunlop process, producing a denser form of latex and the second known as Talalay, resulting in a softer, more “lively” feel. Phoenix provides detailed insights in the TMU article Latex- pros and cons, an explanation of not only the differences in the raw materials of foams but also in the manufacturing process itself. To quote Phoenix directly: "The feel of the two latex production methods is also different with the denser Dunlop feeling less lively or “springy”, blended Talalay being more springy, and natural rubber/ NR Talalay being the most elastic and lively yet. The difference is a matter of preference in feel rather than a difference of “better or worse.”
The Bloom Hybrid uses Quantum coils in 8" that is 16 gauge along the perimeter (with a different geometry) and 13 gauge in the center, numbers cited in previous post, Quality Bed in a Box or “S” brand. While I don’t find similar/ comparable information here for Nest Latex Hybrid, both manufacturers use high quality, durable pocket coils in the mattress construction, the difference in a 6" versus 8" coil would not be a “quality” concern here but more of a support preference.
The Phoenix article you mention, Five steps to your perfect mattress- Durability, does reference “weakest links/ weaknesses” as those lesser quality mattress materials often found in the comfort layers, which could break down more quickly in response to wear and use. Both the Nest Latex Hybrid and BB Bloom Hybrid use 3" of latex foam in the comfort layer, the highest quality foam in terms of comfort and durability, over a pocket coil support layer, nothing here to suggest a “weakness” in terms of durability.
Thanks to consumer subscribers @Kdot and @happycat8 for sharing your experiences and research with the TMU forum. Hearing both the “good” and “bad” details is helpful when seeking more information, providing it goes with the caveat of knowing that only You can feel what You feel in terms of personal comfort preferences/ PPP of a mattress. Thanks for keeping us updated Endymion and looking forward to hearing how things go .
Sensei