Hi Mamie,
I think the choice of materials is a personal preference although and as danielrhall mentioned a latex pillow can be very different animal from a latex mattress and there are also many different types of latex mattresses (just like other types of mattress) in every part of the firmness/softness range.
Post #2 here links to various lists around the forum that are probably the ones that are closest to you.
Good local testing that is as objective as possible … particularly with some good guidance … will give you the best odds of choosing a mattress that is the best “match” for you. Of course nothing is foolproof but accurate testing tilts the odds of making good choices much more heavily in your favor.
The Carbamate that Dixie foam sells is an HR polyurethane foam and is a high quality foam.
Phoenix