Hi jovan,
Either one in a suitable firmness level (not too soft) would most likely be “enough” to isolate you from the firmness of a laminate floor although “how much” of the firmness of the floor you may feel or the specifics of a latex layer that would be “ideal” for you in terms of PPP in combination with your futon would depend on the specifics of your futon, the thickness and firmness of the latex, and on your weight distribution and sleeping positions. The firmness you are feeling may also be coming from the futon itself rather than the floor. There are too many unknowns, variables, and personal preferences and sensitivities involved for anyone to know how any combination of materials will feel for you with any certainty until you’ve slept on it which is why I don’t make specific suggestions (see mattress firmness/comfort levels in post #2 here) but the choice between Dunlop and Talalay really is a preference choice and both of them come in a wide range of firmness levels.
Phoenix