Hi adam s,
Yes … not surprisingly because they are a manufacturer that is more interested in “educating” you and providing their customers with good information instead of just “selling” you … all of this is both true and accurate.
Post #16 here has more information that should help you compare them.
Post #13 here has more about how to assess the “value” of a mattress purchase but based on the quality of the materials the extra cost would certainly be “worth it” yes.
Phoenix