Stall Stick position is only for 1 SPECIFIC aircraft configuration. Change in Cof G, Flap position and even Power where the Tail-feathers are blown by engine thrust or even having the gear extended will vary it but the concept is sound.
AoA is determined by the Pilot moving the elevators (Unless they become stalled by an extreme rear Cof G Situation out of the Normal range). Stalling is when the Airflow over the wing becomes disturbed and breaks away from the Aerfoil profile and makes little Lift and a Lot of drag at an angle to the relative airflow exceeding 14 degrees. IF you reduce the Lift needed, Stick forward, you can immediately Unstall the wing . Don't lower the Nose too far or you will be Pointing at the ground and May need more height than you have to recover. . If you are close to level hit the Power, and you will recover with minimum height loss. Maybe NONE. If you were in a turn, roll wings level with Ailerons, before you have excess speed. Nev