Good morning Montrealer,
It’s wonderful that you’re exploring options to find your ideal mattress. Talalay latex is known for its high quality and offers a softer feel compared to Dunlop latex. It is commonly used as a comfort layer due to its plushness. On the other hand, Dunlop latex is often chosen for its durability and is better suited as a core or support layer. It’s worth noting that while Talalay latex is highly regarded, it is not GOLS (Global Organic Latex Standard) certified, more on this here if you want to go down this rabbit hole.
As for their prices they seem fair, but If you shop in the TMU Trusted Members you may be able to find better prices along with GOLS certified latex if that is important to you.
Their Talalay coil mattress has only 1" of Talalay latex. The rest of the mattress is made of some memory foam and HR foam that does off-gas. Is this what you are looking for?
Best of luck to you, and feel free to ask more questions as you go through the process
Mario~