Hi ZhivagosGirl.
The minimum density for polyfoam that we recommend for questions of durability is 1.8 lbs per cubic foot, so their Omalon foam is well above that. You can read more about our thoughts and recommendations on that front by visiting our Mattress Durability Guidelines.
With regards to the other mattress you mentioned, I’m unable to make a commentary beyond the durability, as only you can feel what you feel on a mattress; people with different body types, sleeping positions, or preferences can make very different mattress comfort choices from each other. So you’d first need to do some narrowing down based on your preference of materials, needs, and the other parts of your Mattress buying personal value equation and things that are most important to you.
That said, the 7-zoned latex sends up a slightly red flag for me. While zoning when done correctly can be very beneficial, it is also the subject of some misinformation and deceptive sales practices which are used to sell mattresses. If you choose a zoned mattress, 2 or 3 zones are generally the most important, and more than this can have questionable benefits and can sometimes lead to the purchase of an inappropriate and very uncomfortable mattress. Zoning schemes that use more than 3 zones may also be less effective in some cases because the zoning differences are sometimes less than the natural differences across the surface of the layer (especially in the case of zoned foam layers) or the zones may not “fit” the specific body type or sleeping style of the person on the mattress.
NikkiTMU