Cessna 560XL Citation Excel, XLS, XLS+ & XLS Gen2
If you look at the Citation Excel series, you can clearly see that two other Citation models have been combined. The nose and forward fuselage are of the Model 750 Citation X, of which the fuselage was shortened. The Citation Excel however has the blunt nose of the Citation III. The wings and tail come from the Cessna 560 Citation Encore. Also the engines are of the same family as the Encore. Typical for the Model 560XL are the ventral fins below the horizontal stabiliser.
The different versions of the Cessna Model 560XL are only distinguished bt the nose.
Cessna 560XL Citation Excel & Citation XLS
The first version of Model 560XL is the Citation Excel. It is as described above, with a blunt nose. The aircraft got a facelift in 2003 and that became the Citation XLS. However, nothing changed on the outside, only on the inside.
Cessna 560XL Citation XLS+ & XLS Gen2
The current Model 560XL is the Citation XLS+. Apart from FADEC engine controls and improved PW545C engines, the XLS+ also has a more pointed nose than the Excel and XLS, and is much like that of the Citation X and Citation Sovereign.
The Citation XLS Gen2 can be distinguished by lighted air stairs and a different curtain, both which can only be seen when the door is open. Other changes are in the cabin.
Confusion possible with
The Citation Sovereign can be regarded as a stretched Citation Excel. However, it is a lot bigger and also the tail is significantly different: it looks a like that of a Lockheed Jetstar.
The Citation Latitude has some elements in the external appearance that look like coming from the Citation Excel, especially the delta fins. However, the cockpit windows are different, and not looking like the ones originally developed for the Citation III anymore.
The Citation Encore is one of the aircraft of which elements are used in the Citation Excel, namely the wings, tailplane and engines. The fuselage of the Citation Encore (and other members of the classic Citation series) is different though, especially the cockpit windows.
This small bizjet also looks a bit like the Cessna Citation Excel, but then with a slightly swept wing, winglets and cockpit windows similar to the HondaJet.