Hi benjammin,
Dunlop latex comes in a wide range of firmness levels and both molded Dunlop and continuous pour Dunlop are available in ILD ranges that would be softer than a 28 ILD Talalay layer although continuous pour Dunlop is generally available in softer versions than molded Dunlop.
The choice between Dunlop and Talalay is more of a preference choice than a “better/worse” choice and there is more about the difference between Dunlop and Talalay in post #7 here.
I would also keep in mind that ILD’s may not be comparable between different types and blends of latex (see post #6 here) so a specific ILD with one type of latex may not feel the same in terms of firmness/softness as another type of latex even though it may be “rated” as having the same ILD.
When you are purchasing layers that you haven’t tested in person then the return or exchange policies of the store you are buying from would become a more important part of your purchase.
Knowledgeable and experienced retailers and manufacturers can also give you good guidance about how the latex they sell would compare to other types and blends of latex that they are familiar with.
Phoenix