Hi arsarca,
Simmons has never been particularly open about their foam specs at any time and even when they are it only makes their relatively low value even more obvious to those who know how to compare them to other mattresses.
Unfortunately there is no way to answer your question although I suspect that most of their foam densities are similar to what they were when they had the NXG line (a combination of lower quality and higher quality memory foam depending on the mattress).
As you can see in post #1 here and the information steps and guidelines it links to … I would never have considered them as a reasonable quality/value option anyway either before their current model lineup or now.
Phoenix