Cessna 650 Citation III/VI/VII
The Cessna Citation III was the first Citation with a T-tail. It also has a different type of fuselage compared to the Citation I and Citation II. The cockpit windows and the large thrust reverser fairings allow an easy distinction from other bizjets with T‑tail and engines attached to the rear of the fuselage.
The Citation VI is a Citation III with somewhat simpler equipment. We have found no external differences to distinguish the two versions, hence we mention it under the same heading as the Citation III.
The Citation VII has a different version of the TFE731s that power the Citation III/VI, but this has not led to a different external appearance.
Confusion possible with
In general appearance the Citation III and Citation CJ4 have something in common. Look for example at the shape of the cabin windows and the tailcone. However the cockpit windows are significantly different, as well as the engines nacelles. Note that there is hardly any fairing between the horizontal and vertical stabiliser.
Especially when looking at the nose there is quite a resemblance between the Citation III and the Citation X; the heritage is clear. However, compared to the Citation X the Citation III has smaller engines, without external holders for the thrust reversers, and a smaller fairing behind the horizontal stabiliser.
The main differences between the Citation III and the Embraer Phenom 300 are in the cockpit windows, engine nacelles and top of vertical stabiliser. Also note that the Phenom has both a dorsal fin and a ventral fin, as well as winglets. So it shouldn't be so hard to keep them apart.
Like the Citation III the Pilatus PC-24 has no winglets, but for the rest there are many - sometimes subtle - differences. Look for example at the cockpit windows, engine nacelles, top of vertical stabiliser and nose gear doors.