Hi Gardner1,
The first step in any mattress purchase (or even when you are testing a mattress) is to make sure you can find out the specifics of what is in the mattress. There are many latex mattresses on the market that may not be what they appear to be.
You can find some comments about the Prana mattresses in post #3 here and in this thread and a forum search on Prana (you can just click this) will bring up more about them as well. As you can see it has several inches of polyfoam (not latex) in the top layer of the mattress. It would be important to know the density of the polyfoam because it would be the weak link of the mattress and much of what you “feel” would be the polyfoam not the latex.
“Comfort” is very subjective and relative to each person’s perceptions.
When you are matching two mattresses you would need to know the specifics of every layer in terms of the thickness, type of material, and the softness/firmness rating of each layer as well as the specifics of the cover to make any meaningful comparisons. If all the components are the same (which would be rare between two mattresses) then the mattress would have a very similar feel and performance. Every difference between the layering and components between the two would change how they feel relative to each other.
These are very different mattresses although both Pranasleep and SleepEz uses Talalay latex in their designs. Because of the polyfoam on top of the Prana and because they don’t list the ILD of the latex layers in the Prana (which isn’t connected to the quality of the materials), it’s not possible to predict how they may “feel” or compare in theory except in a very broad and general sense (soft, firm etc) outside of side by side testing based on each person’s unique experience. At least you have some idea of how a Talalay latex support core feels relative to an innerspring or other types of support core.
If you are in the general Boston area (I’m guessing because you mentioned Jordan’s) then there are also many other latex mattresses you can try and some of the better options and possibilities in the area are listed in post #2 here.
Phoenix