The Falcon 900 family includes the original Falcon 900, the Falcon 900B, the Falcon 900C, and the Falcon 900EX. Here are some key differences between the models:

Size: The Falcon 900 has a cabin length of 33.2 feet, while the Falcon 900B, 900C, and 900EX have a cabin length of 38.9 feet. The cabin width is the same for all models at 7.7 feet, and the cabin height is also the same at 6.2 feet.

Range: The Falcon 900 has a range of 4,200 nautical miles, while the Falcon 900B has a range of 4,350 nautical miles. The Falcon 900C has a range of 4,500 nautical miles, and the Falcon 900EX has a range of 4,750 nautical miles.

Speed: The Falcon 900 has a cruise speed of Mach 0.80, while the Falcon 900B, 900C, and 900EX have a slightly faster cruise speed of Mach 0.84.

Engine: The Falcon 900 is powered by three Honeywell TFE731-5AR-1C engines, while the Falcon 900B, 900C, and 900EX are powered by three Honeywell TFE731-5BR-1C engines. The 900EX also has the option for upgraded Honeywell TFE731-60 engines.

Avionics: The Falcon 900 and 900B have a Honeywell Primus 2000 avionics suite, while the Falcon 900C and 900EX have a more advanced Honeywell Primus Elite avionics suite.

Cabin: All Falcon 900 models have a three-zone cabin with a galley, a lavatory, and seating for up to 19 passengers. The cabin of the 900C and 900EX is slightly longer, allowing for more seating configurations and greater comfort. The 900EX also has a more advanced cabin management system.

Overall, the Falcon 900 family is known for its long-range capabilities, spacious cabin, and reliable performance. The newer models, such as the 900C and 900EX, offer more advanced avionics and greater range, making them popular choices for business and private travel.