Passenger cabin: Latitude maximum seating capacity is 9 compared to 12 for Longitude. Longitude has a longer cabin.
Flight range: 5,278 kilometers Latitude, that is suitable for US transcontinental compared with 6,482 kilometers for Longitude, that makes possible to connect directly international city pairs. Jets have different engine - Pratt & Whitney PW306D1 on Latitude and Honeywell HTF7700L on Longitude.
Price: also the price of new jet is different – Latitude is around €16–€19 million and Longitude is around €28–€32 million.