BMW 3 Series Gran Turismo (2021) is 36 mm (1.42 inch) higher, 314 kg (692 lbs) lighter and has 74 liters (2.61 ft3) bigger cargo space than Cadillac CT6 (2020).
Cadillac CT6 (2020) is 401 mm (15.79 inch) longer and 51 mm (2.01 inch) wider than BMW 3 Series Gran Turismo (2021).