I use an Indy car seat in my Winston Cup car. The seat is stronger. It holds a driver in place more. It also has an insert that molds to a person's body and makes the body and seat one. This adds more cushion to absorb impact and it keeps the body movement to a minimum.
Bars are longer around the sides of the head, which reduces side to side movement.
The insert has an added pad for protection behind the neck and back of head area. Adding the HANS device to features already in place will keep head movement to the front from happening. I am not saying these features will protect everyone in every situation, but I think this seat is safer than most. All of us need to rally together to figure out ways to make these cars safer. It will be difficult to go to Rockingham.