Hi SleepyinNY,
Welcome … and I’m glad you found us 
As you mentioned these are very different mattresses with different materials and components but I’d be happy to comment on the quality of the materials inside them.
These are all high quality materials and latex is a very durable material so there are no weak links in this mattress.
I would need a little more information about the quality/density of the materials in this mattress to make any meaningful comments about it. The information you would need is in this article and if you can find this out then you can compare it to the quality guidelines in post #4 here. You would particularly need to know the density of the top 3 foam layers. The compressed polyboard is fine and the 1 1/2" insulator pad is fine as well. While it’s not generally the most important part of the durability of the mattress … it’s also a good idea to find out the specifics of the innerspring so that you can make more meaningful comparisons with other similar mattresses as well.
If you can find out the density of the top 3 layers I’d be happy to make some comments about the quality of the materials. Even if the quality/density is good though … the latex in the first mattress would be more durable than the materials in this mattress although of course it would also be in a higher budget range.
Post #13 here also has more information about the most important parts of the “value” of a mattress purchase that may also be helpful.
Phoenix