Hi Manny,
They are both latex so would be very similar in terms of durability because all latex is a very durable material although softer materials will be less durable than firmer versions of the same material and this holds true for latex as well. You can read more about the factors involved in the durability and useful life of a mattress in post #4 here. none of these latex mattresses would have any obvious “weak links” or low quality materials.
The “ideal” in a mattress is “just enough” softness and thickness to relieve pressure in your most pressure prone position (usually side sleeping) so that there is less risk of alignment issues in your other sleeping positions. I can’t see you on the mattress or feel what you feel so your own careful and objective testing using the testing guidelines would be the best way to tell.
Phoenix