What psi level is the NFL standard? What psi level were the tested balls at? Was it only New England that had the altered balls to use? What are the balls filled with? Air? Nitrogen? Something else? Did the kickers have different inflation levels?
Typical American fact free news coverage.
The balls are required be inflated between 12.5 and 13.5 pounds per square inch and weigh between 14 and 15 ounces.
The rest of your question I have not found the answers to.
yet.