From an airbus/boeing doc discussing about loss of control,upset recovery...
The flight path angle is the angle between the flight path vector and the horizon. This is also the climb (or descent angle). On the newest generation jet transports, this angle can be displayed on the primary flight display (PFD), as depicted in Figure 18. Flight path angle can also be inferred from the vertical speed indicator (VSI) or altimeter, if the ground speed is known. Many standard instrument departures require knowledge of flight path angle in order to ensure obstacle clearance.
Angle of attack is also the difference between the pitch attitude and the flight path angle with no vertical wind component. The angle of attack determines whether the aerodynamic surfaces on the airplane are stalled or not.