Hi majorleague,
There is more about how Dunlop compares to Talalay in general terms post #7 here.
In very general terms … the properties, “feel” and firmness of materials and components that are closer to the top surface of a sleeping system will tend to have a bigger effect on the overall “feel” and firmness of a mattress than materials that are deeper in the sleeping system, thicker layers or toppers will contribute more of their feel and firmness to the overall sleeping system than thinner layers, and a thinner layer would “allow” more of the feel and properties of the layer(s) underneath it to “come through” than a thicker layer.
Different people can also be more or less sensitive to differences between materials and mattresses than others so depending on the specific combination of layers and on the body type, sleeping style, and sensitivities of each person … some people may notice differences in side by side comparisons between them that for others would be less noticeable or in some cases not noticeable at all.
Both of them are high quality and durable materials but the only way to know for certain whether any specific combination of layers would be a good “match” for you in terms of comfort, firmness, and PPP (Posture and alignment, Pressure relief and your own Personal preferences) will be based on your own personal experience.
Phoenix