The Comp Air 9 was developed around the same time as the Comp Air 12. This is visible in some elements like the cockpit and cabin windows. But for the rest it is quite different. Later the Comp Air 6.2 was added to the family.

Typical for these composite aircraft is the sleek appearance of the streamlined fuselage. This is not so 'boxy' as similar aircraft. The CA6.2 and CA9 have a fixed landing gear like those competitors, optionally with streamlined pods around the wheels. Furthermore, it has a high mounted wings without wing struts, a normal tail with tall vertical fin and a single prop engine in the long nose.

The different versions of the Comp Air 6.2 and Comp Air 9 can be distinguished by looking at

• the shape of the cockpit windows
• the shape of the cabin windows
• the shape of the nose
• the presence of a dorsal fin
• the presence of ventral fins
• the presence of winglets

Being the only piston powered version, the Comp Air 6.2 is easiest recognised from the family. It has a wide cowling to house the horizontally opposed engine, with air intakes on both sides. The airplane has three large cabin windows on each side. Two are rectangular and the last one is a trapezium on its side. The front cockpit window is a single, curved piece. The Comp Air 6.2 has no dorsal fin in front of the vertical stabiliser.

Basically, this is the turbine powered version of the Comp Air 6.2. It has a longer, narrower nose than the piston powered version. The air intake is below the propeller, and there are exhausts omn both sides of the nose. Additionally. the Comp Air 6.2T has ventral fins and small winglets. For the rest both variants are externally the same.

The Comp Air 9 was the founding member of the family. It is a bit larger and a true eight seater, whereas the Comp Air 6.2 normally seats six, with two more as an option. It is also a turboprop model with a long nose, but with a single large exhaust under the nose, behind the nose gear. Different from the 6.2 versions are the windows: it has two cockpit front windows and three equal, smaller canbin windows. Also, the CA9 has a dorsal fin and ventral fins. An example is shown on the top photo.