Hi thwill,
Just in case you haven’t read it yet … the tutorial post here has all the basic information, steps, and guidelines that can help you make the best possible choices.
As you will see in some of the links in the tutorial post … I would tend to avoid major brands such as Sealy. There is more information about the Optimum line in post #48 here.
The construction of the Quail at Nest Bedding is on their site and it uses good quality materials from top to bottom (you have a choice of either synthetic latex or 100% natural latex in all the layers in a wool quilted cover). You can see my thoughts about Joe and Nest Bedding as well as the other options and possibilities I’m aware of in and around the San Jose area in post #2 here.
The two mattresses you are considering would be very much an apples to oranges comparison because one is memory foam (the Optimum Radiance) and one is latex which are very different materials and not really comparable (see post #2 here).
Phoenix