411A, the Boeing FBW system of "envelope protection" uses pitch control to maintain airspeed, rather than using pitch control to maintain an AOA value. It's a fundamentally different approach, although I must admit I understand the Airbus system better than I understand the Boeing system.
Because the basic approach to "envelope protection" is fundamentally different between the designs, the possibilities and permutations MUST be different when flight occurres near the "edge" of the envelope. These are the areas of flight where the weaknesses of either design will be exposed.
Now I want to go learn more about the Boeing system...