Country of Origin: Tejas is developed and manufactured by India's Hindustan Aeronautics Limited (HAL), while the FA-50 is developed by Korea Aerospace Industries (KAI) in collaboration with Lockheed Martin.
Generation: Tejas is a fourth-generation fighter aircraft, while the FA-50 is a light combat aircraft and is often classified as a fourth-generation or 4.5-generation fighter aircraft.
Role: Tejas is a multirole fighter aircraft designed to replace India's aging fleet of MiG-21s, while the FA-50 is a light attack and air-to-air mission fighter.
Engine: Tejas is a single-engine aircraft, while the FA-50 is a twin-engine aircraft.
Maximum Speed: Tejas has a maximum speed of Mach 1.8, while the FA-50 has a maximum speed of Mach 1.5.
Weapons payload: Tejas can carry a variety of air-to-air and air-to-surface missiles, while the FA-50 can carry a variety of missiles, rockets, and bombs.
Range: The FA-50 has a longer range than the Tejas.
Avionics: Tejas has more advanced avionics than the FA-50, including a modern glass cockpit and advanced fly-by-wire flight controls.
Cost: The cost of the Tejas is estimated to be lower than the FA-50, making it a more affordable option for countries with limited defense budgets.