The Eware SS is a single ply SS pan with a thick disk on the bottom that is SS on the outside and aluminum on the inside for even heat distribution.
Regular All-Clad SS is a tri-ply Pan. There is a layer of aluminum sandwiched between two layers of SS. The tri-ply material is used throughout the entire pan (excluding the handle and lid), not just in a disk on the bottom.
The Disk bottom pans are less expensive but, if you have a gas stove and the flame extends beyond the edge of the disk to the single ply SS, the food in the pan can burn. This can happen with the smaller pans that have smaller disks.
The tri-ply pans will not have that problem but are more expensive.
There is also an anodized aluminum line of Emeril ware from All-Clad.
"If you want to make an apple pie from scratch, you must first create the universe." -Carl Sagan