Hi jdsouthpaw,
Probably not. The mattresses they carry at R&S are different from their Dreamfoam or Brooklyn Bedding mattresses.
I don’t know the specifics of the Palazzo so I don’t know how it would compare to any of their other mattresses. You would need to find out the specifics of the materials for any mattress you are considering to make any meaningful comparisons with other mattresses (see this article).
It depends on which specific mattress you are referring to because there are a range of mattress designs and materials in both but post #4 here includes some general comments about both of them.
Phoenix