Hi FAUguy,
I would also be concerned about the lower density polyfoam in their previous versions as well and I would consider it to be a potential weak link that could lead to premature foam softening and breakdown or sagging. Lower quality/density materials really don’t belong in a mattress in this budget range and I’m glad to see that they improved the quality/density of the polyfoam in the new design.
SleepEZ and other component latex manufacturers would be able to give you good guidance about which of the options they have available would be closest to the Savvy Rest mattress that was the best “match” for you.
There is no difference in the quality or durability of the latex in either mattress. SleepEZ provides the option to choose either 100% natural Dunlop or 100% natural or blended Talalay in their layers (and they can special order organic dunlop) and there are 4 firmness choices while Savvy Rest has the option for 100% natural Dunlop that is certified organic or 100% natural Talalay in three firmness choices. The covers would also be slightly different as well (see post #31 here). There is also more about the different types and blends of latex including organic Dunlop in post #6 here.
This is one of those cases where the price of the mattress doesn’t reflect a significant or meaningful difference in quality and Savvy Rest is generally priced higher than a number of other manufacturers that also use similar types and blends of latex and have a similar cover and a similar design. There is also more about how SleepEZ compares to Savvy Rest in post #4 here and a forum search on SleepEZ Savvy Rest will bring up all the forum posts that mention both of them.
Phoenix