Cessna 680A Citation Latitude
The Cessna Citation Latitude is a completely new design, although some elements in the external appearance look familiar. In particular the Latitude is clearly derived from the Citation Sovereign, with a shortened fuselage and bent-up wingtips, and delta fins of the Citation Excel. The Citation Latitude has four curved cockpit windows, instead of the six inherited from the Citation III.
This type is used by the Japanese air force as flight checker. This version has designation U‑680A.
Confusion possible with
Cessna 560XL Citation Excel/Ascend
In particular the Citation Ascend version of the model 560XL family is similar to the Citation Latitude, especially the ventral fins and cockpit windows. The gears all have single wheels and the wings are straight. The Citation Excel and XLS still have the old-style - Citation III - cockpit windows.
Cessna 680 Citation Sovereign
The aircraft mostly similar to the Citation Latitude is the Citation Sovereign. The model number of the Latitude (680A) already shows the family relationship. The main differences are the cockpit windows, length and (lack of) ventral fins. Note that the Sovereign+ has bent-up wingtips like the Latitude, so don't be fooled by them.
IAI1126 Galaxy/Gulfstream G200
While smaller and narrower the tail of the Gulfstream G200 may make you believe to have encountered a Citation Latitude. For the rest the aircraft types are sufficiently different to keep them apart easily.
Lockheed Jetstar
The four engines attached in pairs to the rear fuselage, large tanks under the wings and a cruciform tail are unique for the Jetstar, but the Citation Latitude comes closest in appearance, especially for the twin engine L-329. However, the Citation has different cockpit windows and no tanks attached to the wings.