Hi brc722,
You can read more about so called “plant based” polyfoam in post #2 here. It’s just regular polyfoam which has replaced a small percentage of one of the chemicals used to make it with a plant oil based derivative and would be comparable to regular polyfoam of the same density in terms of its durability.
You can read more about a latex/polyfoam hybrid (which has a latex comfort layer over a polyfoam support core) vs an all latex mattress in post #2 here.
Latex is the most breathable of all the foam materials (polyfoam, memory foam, latex foam) so in general there would be less issues with temperature regulation with latex comfort layers than other types of foam comfort layers (regardless of the type of support core in the mattress). There are also other factors that can have a significant effect on temperature regulation as well and there is more about these in post #2 here.
Hopefully you’ve also had the chance to read the tutorial post (the link is in the top right corner of the page) which has all the basic information, steps, and guidelines that can help you make the best possible choices … and know how to avoid the worst ones.
Phoenix