Hi Yankee_In_TX,
The information you need is in this article.
As you know … Texas Mattress Makers is one of the members of this site which means that I think highly of them and I believe they compete well with the best in the industry. While I don’t know the specifics of the mattresses you are considering … the odds are good that both mattresses use high quality materials and have no weak links.
You can see the specifics of the NanoCoil here. It’s a type of microcoil used in comfort layers instead of foam and has a higher coil count than their Softech microcoils. It’s a high quality and durable component.
You are certainly looking in a good direction
Phoenix