BMW 3 Series Gran Turismo (2021) is 46 mm (1.81 inch) higher, 236 kg (520 lbs) lighter and has 100 liters (3.53 ft3) bigger cargo space than Citroen C6 (2020).
Citroen C6 (2020) is 84 mm (3.31 inch) longer and 30 mm (1.18 inch) wider than BMW 3 Series Gran Turismo (2021).