Posturepedic® Gel Series collection is a upgraded line from Classic Series. It offers improved support and especially less motion transfer with individually encased Apex™ Coils (704 in queen). Sealy markets these springs as made out of Titanium alloy, but they are actually steel springs with a miniscule amount of titanium. Gel Series feature gel memory foam as a main material in comfort layers.
Gel Series models come in several softness options: Firm, Cushion Firm, Plush, Pillow Top these will vary in type and thickness of the comfort layers.
Some retailers have their "exclusive" collections with minor modification in type and thickness of padding layers. When comparing models always focus on coil type and coil amount, and also presence and thickness of premium materials - memory foam, gel foam, latex. Many retailers will have different names for the same mattress in this line, so you need to focus on an actual line not a single product. To learn more about different names of the same mattress click here.
FlameGuard Rayon Fiber
Gel Memory Foam
High Performance ActiveFlex™ - select firm models
Gel Memory Foam - select more expensive models
PostureGrid Foam - select models
Apex™ Individually Encased Coils - select models
Posturepedic® Classic DS Inter-connected Coils - select models
SolidEdge™ System - foam encased
Reflexion® 4 Adjustable Base
of 1 1/2" or greater