Hi anniesearch,
The Luma Mattress has a 1.5 1.8 lb polyfoam base, on top of which is a Quantum Edge pocketed spring unit. Above that is 1.5" of blended Talalay latex that can be had in either 19, 28 or 36 ILD.
The Luma Latex Hybrid Slumber System adds a 3" separate blended Talalay latex topper to the Luma Mattress, and this topper may also be had in 19, 28 or 36 ILDs.
The feel of the mattress would depend upon the ILD of the latex you chose, and most importantly would be determined by your own personal preference based upon sleeping on the product. There are many people who prefer a minimal amount of padding on top of their mattress, and a pocketed coil spring unit by itself can be quite conforming.
My best suggestion would be a phone call directly with Luma, as they are quite experienced with their design and how it fits different people and sleeping styles, and they would best be able to suggest if this configuration might work for your sleeping style, and if a certain ILD of the latex in the Luma Mattress might work better if you decide to add a topper down the road. As for the pricing, the queen Luma Mattress is currently $895.00 and the Luma Latex Hybrid Slumber System is $1495.00, with 10% or more off for TMU members (code TMU10). They do allow one year for a free exchange of the latex in the topper layer if you decide to make a change.
The Luxury Bliss has a different design in the covering, using a quilted cotton cover, so for the sake of comparison let’s assume all of the layers of foam in the Luma Latex Hybrid Slumber System were contained in a single cover, as opposed to the separate topper system they currently use, and compare those two configurations. Once a mattress pad and a fitted sheet are placed over the item, the difference would be small, if even perceptible, between the two configurations. In theory, having the topper separate would allow for a bit more conformation in the upper layer, so there could be a bit more “plushness” felt.
Stretch-knit covers are very popular with latex mattresses, so I wouldn’t say that most use a cover with wool quilted to it. The Luxury Bliss uses a cotton cover and that is quilted to wool, both for comfort and to pass flammability regulations. I’m not sure if anything else is blended with the wool or if there is anything else quilted to the cover, as the information on the various online sites selling this mattress unfortunately contain more generic information. This would be good quality material and would be breathable.
The covering used on the Luma Latex Hybrid Slumber System and the Luma Mattress is Tencel, which is a cellulosic fiber that is also breathable and durable. Luma uses an inherently non-toxic fiber layer under the covering to pass federal flammability guidelines instead of wool. The Luma cover is also removable and washable.
While the covers used by all of the mattresses you mentioned are good quality and breathable, the layers closest to your skin will have the greatest impact upon temperature regulation. Wool does an excellent job at storing and releasing moisture, as does Tencel, but a mattress pad using wool might have a more direct impact upon your sleeping temperature.
There is more about tracking down a potential cause or causes for temperature regulation issues in post #2 here and the posts it links to that may be helpful (including more information about wool). There is also more about sheets and bedding in post #7 here. In many cases changing the mattress protector, sheets, or bedding to cooler versions can make a large difference for many people who would otherwise sleep hot on a mattress.
I hope all of that information is helpful.
Phoenix