Hi fkudlack,
The old Beautyrest World Class mattresses were a line of mattresses that included many different models that used a pocket coil innerspring with various combination of foam layers that could include polyfoam, memory foam, or latex on top of the innerspring although lower quality/density polyfoam or memory foam would be most common in most of their models. The World Class Exceptional used a microcoil as one of the comfort layers so it was a “coil on coil” mattress. For the most part they have never provided any meaningful information about the quality/density and durability of most of their foam layers.
The Beautyrest World Class line was one step above the Classic line and the Exceptionale was a step above that. The Beautyrest Black was the top end of their lineup but none of the Beautyrest mattresses (including the top end of their line) were good quality/value mattresses and all of them used lower quality and less durable materials than I would consider.
Subject to first confirming that any retailer or manufacturer on the list that you wish to visit is completely transparent (see this article) and to making sure that any mattress you are considering meets the quality/value guidelines here … the better options or possibilities I’m aware of in and around the Philadelphia/Wilmington/Trenton areas are listed in post #4 here.
Phoenix