Switch off the flight directors, then display the `bird` - now you can see your AOA - it is the difference between the pitch angle and the bird. Same principle for any stage of flight
Not exactly the same, since the wing's chord line isn't always parallel with the aircraft's longitudinal axis. Certainly isn't on the airbus.
The aoa is the relation between the wing's chord line and the airflow. Comparing the FPV with the pitch angle would be similar to comparing the airflow with the aircraft's longitudinal axis instead of the chord line.