Hi Gunshy,
Unfortunately the specs you listed are incomplete and don’t include all the information that you would need to know to make any meaningful assessments about the quality and durability of all the materials in the mattresses or identify any potential weak links (or for me to make any meaningful comments about them). This page includes the information you would need to know and if you can find out and list the complete specs on the forum I’d be happy to make some comments about the quality of the materials in any of the mattresses you are considering or help you identify any potential weak links in any of them.
With the Jamestown Ultra Supreme I would be very cautious about any mattress that uses more than about an inch or so of memory foam that is less than 3 lb density (see the foam quality/density guidelines here)
Phoenix