Reverser design must be a player also…we are one of the few 757 operators that have both P&W and RR engines in our fleet. The Rolls reversers just make noise and provide little reverse thrust. The P&W reversers will lean you forward in the seat, even at low speeds (book says idle reverse below 80K).
Because they are not required for certification or any performance data, I’ve never seen a truly usable “reverse thrust” chart, indicating reverse thrust force. My guess is that the airframe/engine manufacturers have this data, and it would be interesting to see if anyone has access and could post some info.