Yes the -300 is longer but the easiest way to tell from a distance with out a sibling to compare with is via the tail skids as the number of doors and overwing exits are dependent on the configuration specified at the time of production. QF -300s don't have the doors forward of the wing;the 'Falcons' with the RB211s do; AN -200s RML & RMK had two overwing exits; the rest had one.