Hi merak1990,
I would say that it’s not only hard but it’s almost impossible to know how any material will feel to you (regardless of how it feels for someone else) without a frame of reference based on personal experience. The only realistic way to know what something feels like will be based on your own personal testing or experience and if there are any local stores that carry different types and firmness levels of latex it may be a good idea to try them.
I would keep in mind that both Dunlop and Talalay come in a wide range of firmness levels so Dunlop could be either softer or firmer than Talalay depending on the firmness level that you choose.
That would depend entirely on how you define better or worse. They are different and each material has its own pros and cons. There is more about the different types and blends of latex in post #6 here and more about the synthetic continuous pour Dunlop latex in post #2 here. The natural and synthetic have similar but slightly different properties.
They both come in a range of firmness options from soft to firm so either one could be either softer or firmer than the other one depending on the firmness of the specific layers you are comparing.
Phoenix