This mattress doesn’t use Talalay latex. They use 100% natural continuous pour Dunlop. There is more about the Purity mattress in post #2 here and they are similar to the Spindle Abscond mattress here which also uses the same type of latex but has different comfort/support options, a lower price, and has a layer exchange policy as well.
These are also Dunlop latex mattresses (not Talalay). One version uses certified organic Dunlop and the other version uses a natural/synthetic blend of Dunlop latex (I believe it is a 50/50 blend).
You certainly have many good options in the area but the mattresses you tested seem to indicate a preference for Dunlop (unless you’ve also tested Talalay latex).