Hi scott442,
You’ve mentioned ILD throughout your post and I should clarify that this isn’t information you need to know or that is important with a local purchase. ILD is a “comfort spec” not a “quality spec” and when you test a mattress your body will tell you what you need to know about softness firmness and PPP.
The only specs you need to make sure the materials are good quality and there are no “weak links” in a mattress are in this article.
With latex … the type and blend of the latex are the specs you need to make meaningful comparisons. There is more about the different types and blends of latex in post #6 here.
You can read more about organic certifications and organic latex in post #2 here and the posts it links to.
Phoenix