Hi Lnr103,
The “feel” of a mattress is very subjective and relative to each person but continuous pour Dunlop is somewhat “in between” molded Dunlop and Talalay and can also be made in softer layers than you will usually find in Dunlop. Dunlop is a method of manufacturing not an actual raw material so any latex layer that uses the Dunlop method of production would be 100% Dunlop although it may use 100% natural rubber, 100% synthetic rubber, or a blend of the two. Of course using the same type of materials in the same layer thicknesses and firmness levels and the same type of cover would have higher odds of “matching” another mattress that used the same materials.
Natural materials and “safe” materials are two different issues. The “safety” of a material depends on the raw materials that are used to make it and whether any of them are harmful or produce VOC’s that are harmful although it’s true that in natural materials have higher odds of being “safer”. Polyethylene and densified polyester are two examples of synthetic materials that have very little VOC’s and are completely safe and latex that is synthetic or natural have both been tested for “safety” to the same standards and testing protocol for harmful substances and VOC’s. I think that the biggest difference between natural and synthetic latex or a blend is in the properties and performance of each type of latex and which one someone may prefer and “natural” or “organic” is more a matter of personal preference or choices made for other personal reasons than it is about “safety”.
The same holds true about a wool cover. The biggest benefit of wool is it’s properties, durability, and performance and it would be a great material to use in any cover for someone that preferred it regardless of what type of materials were inside the mattress so using a wool cover on any mattress doesn’t seem “silly” to me at all for those who want the temperature regulating benefits and the “feel and performance” of using a wool quilted cover.
The value of any mattress purchase depends on which one is the best match for all the criteria of your personal value equation that are most important to you … especially in terms of PPP. No matter what the “commodity value” of a mattress may be in terms of price per inch of material if you don’t sleep well on it then it would have little value to you. I would also consider that “matching” one mattress to another rather than matching each mattress you are considering to a common set of criteria can be very difficult and challenging because even small differences in materials, design, or the cover can make a difference in how one mattress “feels” compared to another (see post #9 here). I would keep in mind that if a mattress is a good match for you in terms of PPP and all the other criteria that are important to you in a mattress purchase and you have good options available after a purchase then you may end up with a “better” and more suitable mattress than the Savvy Rest that you never would have considered if you were limiting your choices only to mattresses that subjectively “feel like” a Savvy Rest.
I would also keep in mind that Savvy Rest uses Radium Talalay and that the firmness ratings you are mentioning (N2 and N4) are from when they were using Latex International.
Phoenix