Hi mikej7.
Welcome to our Mattress Forum! 
You are at a good starting point with asking the right questions about the differences in feel of various materials. I noticed from your other post that you’ve already found Post #7 here that describes the main differences in feel between Talalay and Dunlop Latex, but if you … like many other people looking for a new mattress are used to a spring or memory foam mattress I’d suggest that along with some “theory at a distance” you do some local testing to “compare and contrast” different foams and mattress types based on your needs and preferences. I’d also make sure to have a look at the differences between latex and other types of foam in Post #2 here for latex vs memory foam comparison and in Post #2 here which has some pros and cons of latex vs polyfoam.
Good luck with your testing and search!
Phoenix