Hi SkyFreek60,
Just in case you haven’t read it yet … the first place to start your research is the tutorial post here which has all the basic information, steps, and guidelines that can help you with “how” to make the best possible choices and comparisons between mattresses.
Post #2 here and the links it includes has more about the change in foam (which happened long ago) and the somewhat misleading review which mentions it although you are in a weight range where I would consider the use of higher density base foam (including some of the latex hybrid options that are offered by Dreamfoam’s sister company Brooklyn Bedding).
Post #3 and #4 here also has some links to some lower budget latex or latex hybrid mattresses made by some of the members of this site and others as well.
The Ultimate Dreams Natural Latex Mattress still uses the 2.35 lb foam according to the Amazon description but it’s always a good idea to talk directly with an online retailer or manufacturer to confirm the current specs of any mattress you are considering and more importantly the options that are available (such as split layering for couples with significantly different weights) how suitable a specific mattress design may be for you in terms of PPP and the parts of your personal value equation that are most important to you.
The better options or possibilities I know of in the Pittsburgh area are listed in post #2 here.
Phoenix