Hi tbmh,
Post #2 here and the topper guidelines it links to has more information that can help you use your sleeping experience as a reference point to choose the type, thickness, and firmness for a topper that has the best chance of success.
There is also some information about wool toppers compared to softer foam toppers in post #8 here.
The choice of material would be a preference choice not a “better/worse” choice based on the properties of each type of material that you tend to prefer. There is also more about how latex and memory foam compare in post #2 here but the most reliable way to know which type of material you tend to prefer sleeping on is based on your own personal experience.
Phoenix