Hi Aral,
I would consider the latex from Artilat and Latexco to be good quality and personally wouldn’t have a preference of one versus the other, but instead would look at other issues such as your preference upon blend, zoning, comfort, covers and pricing.
Starting with the Artilat, they do offer different zonings, although I’m not sure what is available to your locally. In their “main” line, Bial is their 3-zone, Pental is their 5-zone, Megal is their 7-zone (little thicker 18 cm version) and Settal is their 7-zone. The Royal is also a 7-zone, but a different pattern which they state has more allowances for both the typical male and female shape. As you mentioned, all of these are Dunlop, 80 SBR / 20 NR. They also offer a MayanGreen line that is 100% NR Dunlop in a multi-zone configuration.
The 7-zone Latexco core you posted is their 100% NR version. While the zoning is of their own design, it would be most similar to the Settal from Artilat, but the Settal is not 100% NR.
I would make sure that you are able to try these different cores out in person and sample the difference between the various zoning options. Sometimes zoning can “complicate” the feel of a mattress, where it works better for different body types and sleeping positions versus others, and in your situation you’re attempting to find something that will work best for the widest audience possible. As you’re considering a thinner mattress, the zoning will be more easily “experienced” by your customers, as opposed to a zoned core under another 6" of latex comfort layers. I know that various active bowed slat systems (some with adjustability) are also popular in Europe, but I don’t know if you’re looking to use that under your mattress (which can further change the comfort of your mattresses) or if you’re considering something more flat and solid in design.
I would next consider the importance to you of having the mattress be natural or blended. The natural will be more expensive, as you’re already aware. This would come down to if you’re going to use this in your marketing or your personal philosophy, as well as your budget. There can be a bit of a different feel from each manufacturer, not only in the blend used but also their formulation, curing process and fillers used. You may find that you have an affinity for one versus the other.
Solid latex core mattress that are in this 6" range are more popular in Europe, and products like this with nice top of bed products (or even a latex topper) would make for a very nice mattress in your hotel. Besides having a nice selection of sheets as you mentioned, you may wish to maintain a collection of toppers in case you have a client who wishes to have a softer surface comfort (sort of like the “pillow butlers” that are common in some nicer hotels where you have multiple pillows from which to choose). Artilat has a variety of toppers, including convoluted, on their web site, although I’m not sure what you may have available to sample locally (Latexco also produces toppers). For your mattresses you’ll generally be better off selecting something in the medium to medium-firm range, and then always have the ability to make the product a bit more plush.
Phoenix