Hi HudaThunkit,
In terms of durability they would be close equivalents. You can read more about the factors involved in durability and the useful life of a mattress relative to each person in post #4 here.
There is more about some of the differences between the “feel” of Talalay and Dunlop in post #7 here but either your own testing on both materials or your own sleeping experience is the only way to really know for certain which one you may prefer.
There are too many variables, unknowns, and personal preferences involved for me to know how either specific design will feel or perform for you. I’ve never slept on either of them so I don’t know how they feel for me much less someone else. The best source of guidance for this part of your research is either your own testing or experience on a mattress that has a very similar design or more detailed conversation with a manufacturer or retailer that has your best interests at hears and who can use their knowledge and experience and the “averages” of their customers that may be similar to you to help you make the most suitable choice out of the options they have available (see mattress firmness/comfort levels in post #2 here). They will know more about their mattresses than anyone else.
Both of these are good quality and value and have no obvious weak links and once you are down to “final choices” between good and good then which one is “best for you” or which one is “worth it” would depend on all the objective, subjective, and intangible parts of your personal value equation that are most important to you.
A mattress isn’t a commodity where you can use a formula to determine value based on cost per inch or pound of material and the “value” of a mattress purchase needs to include all the other factors that your “best judgement” tells you is “best for you” regardless of whether it may be best for someone else. Choosing a mattress based on the price per inch or price per pound of the raw materials would be similar to buying two suits of clothing that used similar materials based on their cost per pound of material rather than on how well they fit, how they look, and they feel when you wear them, and if you hadn’t tried them out in person what your options are if they don’t fit as well as you hoped (much of which would be subjective and based on preference).
Phoenix