Hi SaintLouisSleeper,
Every layer and component in a mattress (including the cover) will have an effect on the feel and performance of every other layer and component above and below it so there is no way for me to know which combination of layers will work best for you … especially when you are adding another variable (the mattress cover).
There is more about some of the differences between Dunlop and Talalay in post #7 here. If both layers are the same thickness and in the same position in the mattress and their ILD was measured in the same way (which isn’t always the case … see post #6 here) then for most (but not all) people a “one step” firmness difference where the Talalay was in the range of about 4 - 5 ILD firmer than the Dunlop would probably feel like they have a similar firmness although they would still “feel” different.
There is also more about the pros and cons of a wool quilted cover vs a more stretchy knit cover in post #6 here.
While I can give you more information about the pros and cons of different options … the only way to know whether any combination of materials and components will be a good “match” for you in terms of PPP will be based on your own personal experience.
My comments were based on the premise that it’s hard to argue with success :).
Phoenix