Hi Dignan17,
You can read about all the different factors involved in the sleeping temperature of a mattress in post #2 here. As you can see … the foam used is just one of the factors that will affect your sleeping temperature.
If you have one mattress that has 3" of latex in a certain ILD in the top layer and another one that has the same 3" of latex in the top layer in the same ILD and you sank into both mattresses about the same and they both had similar quilting and ticking, mattress protector, and sheets, then the “contribution” of the latex would be comparable and they would be fairly comparable in terms of sleeping temperature for most people even with different types of support layers below them.
Most mattresses would have more differences though in the other layers and components that affect temperature and each of these differences would affect the sleeping temperature as well. Wool quilting also adds to the temperature regulation of a mattress so this would enhance the temperature regulation of the 12" and 14" models.
Phoenix