Hi Cantstandmattressshopping,
Reviews wouldn’t tell you anything about which one is “better” or more suitable for you or which one would be more durable for you (see post #13 here) so a lack of reviews (or hundreds of reviews on the other end of the scale) wouldn’t give you any particularly relevant information anyway.
There is more about the most important parts of the “value” of a mattress purchase in post #13 here that can help you make more meaningful comparisons between mattresses.
You can see my comments about the Dormeo Octaspring mattresses in post #2 here and the posts it links to. A forum search on Dormeo or on Octaspring (you can just click the links) will bring up more information and feedback about them as well. I would make some careful value comparisons because they are certainly in a higher budget range than many other mattresses that use similar quality materials and I would make sure that you can justify the higher cost relative to other similar mattresses based on the parts of your personal value equation that are most important to you. If you can provide the specifics of the layers in the mattress (see this article) I’d also be happy to make some comments about the quality of the materials or help you identify any weak links in the mattress.
The same would be the case with the Restonic and if you can provide the information about the layers inside the mattress I’d be happy to make some comments about the quality of the materials inside this mattress as well.
If a retailer or manufacturer can’t (or won’t) provide you with the information you need to make an informed choice about the quality and durability of the materials inside them then I would pass the mattress by.
Without knowing the specifics of what is inside a mattress you are considering it’s not really possible to make any meaningful comments about the quality of the materials in either one and outside of how suitable a mattress is in terms of PPP (which careful and objective testing using the testing guidelines in the tutorial post will tell you) … a mattress is only as good as its construction and the quality of the materials inside it.
Phoenix