Hi tomford4u,
Welcome to the Mattress Forum! :).
I have always loved the image of goldilocks during the mattress buying process, I have done it and seen it so many times with consumers.
I would like to provide a little caution to the thought of “recreate this mattress with a zoned coil layer instead”. Unless Nest Bedding was going to do this for you personally, keeping all other variables exactly the same, you are essentially just trying a new mattress. There are too many variables.
Mattress manufacturers generally try to differentiate their mattress from the mattresses made by other manufacturers and don’t normally try to “match” another mattress that is made by a different manufacturer so unless a manufacturer specifically says in their description of a mattress that one of their mattresses in the same general category is specifically designed to “match” or “approximate” another one in terms of firmness or “feel” and PPP and/or they are very familiar with both mattresses and can provide reliable guidance about how they compare based on the “averages” of a larger group of people that have compared them (different people may have very different opinions about how two mattresses compare) … the only reliable way to know for certain how two mattresses would compare for you in terms of how they “feel” or in terms of firmness or PPP (regardless of anyone else’s opinions of how they compare which may be different from your own) would be based on your own careful testing or actual sleeping experience on both of them.
The coil systems used in Nest and used in other units of our trusted members like Arizona Premium and Luma Sleep are very high quality products. But when one puts up to 4 or 5 inches of high quality comfort layers above the coil system, the zoning effect from the “core” is minimal, if not useless that far below the surface.
If you are so inclined there is more reading about zoning in these links. This article and post #11 here and post #2 here.
Thank you again for your post.
Sensei