Hi ejcrossl,
The minimum criteria that I suggest in the guidelines here would be more durable than the “standard” that is used in most of mainstream industry and would be the minimum densities and guidelines where I wouldn’t (not would) be concerned with durability issues or premature foam softening and breakdown and there would be no obvious “weak links” in the mattress relative to your weight.
There is more about some of the differences between an all latex mattress and a latex/polyfoam hybrid in post #2 here. In the case of the two mattresses you are comparing the two main differences are that one is all latex while the other uses a polyfoam support core and one uses a more costly wool quilted cover while the Dreamfoam cover is quilted with a softer polyfoam.
Only you can decide whether the tradeoff between less costly materials and the feel and performance of each mattress relative to the price of each of them is “worth it” to you but there is more about the most important parts of the “value” of a mattress purchase in post #13 here that can help you make more meaningful comparisons between them based on PPP, the quality and durability of the materials, and all the other objective, subjective, and intangible parts of your personal value equation that are most important to you (including price of course and the return/exchange policy and options you have available to customize the mattress after a purchase that are available to you).
Both of the mattresses you are considering would certainly be a great quality/value choice relative to their price range.
Phoenix