Hi cprice88,
[quote]Princess Touch 10" Latex Mattress
4" 26 lb comfort layer
6" 36 lb core
bamboo organic cotton cover
“100% All Natural Talalay latex” is the claim
Kings Touch 12" Latex Mattress
two comfort layers of 3" 26 lb
6" 36 lb core
same cover[/quote]
These are all high quality materials and there would be no weak links in either mattress.
So called “soy based foam” is just polyfoam that has replaced a relatively small percentage of one of the two main chemicals used to make the polyfoam (the polyol) with a polyol that is derived from soy oil (see post #2 here). It would be closely comparable to other types of polyfoam that are the same density range. I would want to know the density of any polyfoam in a mattress.
There is also more about latex/polyfoam hybrids vs all latex mattresses in post #2 here.
Phoenix