Hi Big guy,
For the moment … I would be very cautious with Restava (see the sticky post here and the topic it links to) until they can confirm the changes they have made in their mattresses.
Other than that, neither or your remaining two finalists has any weak links in their design in terms of the quality of their materials. I would make sure of course that you have had a more detailed conversation on the phone with each of them so they can help “talk you through” how each of them may “feel” to you (I wouldn’t only go by manufacturers firmness ratings which aren’t standardized and may not be directly comparable to each other). I would consider this to be one of the most important parts of any online mattress purchase (see mattress firmness/comfort levels in post #2 here).
Convoluted base foam can have “some effect” on ventilation and sleeping temperature but the effect would be greater if there was also a pathway for the air to go through the memory foam layers into the convoluted channels below it (see post #2 here about cooling down memory foam). How much effect it has would depend on how much airflow there is through the top memory foam layers and on the combined effect of all the other variables that can affect sleeping temperature as well (see post #2 here).
Brooklyn Bedding uses 2.17 lb polyfoam which is a high quality material. At this point … the density of the Restava base foam is unknown until they provide more information about the changes they have made in their mattresses.
Yes you’re correct … they are not a member of the site (see post #4 here)
Post #13 here has more about the most important parts of the “value” of a mattress purchase but once you are down to finalists that are all choices between “good and good” and if there are no clear “winners” between them then a final choice (see post #2 here) that is “best for you” would depend on the results of your conversation with each of them and “best judgement” based on all the other parts of your personal value equation (including price and any return or exchange options) that are most important to you. When you have reached this point it’s quite likely that either one would be a good choice.
Phoenix