BMW 6 Series Gran Turismo (2019) is 335 mm (13.19 inch) longer, 88 mm (3.46 inch) wider, 117 mm (4.61 inch) higher and has 306 liters (10.81 ft3) bigger cargo space than Cadillac CT4 (2021).
Cadillac CT4 (2021) is 243 kg (536 lbs) lighter than BMW 6 Series Gran Turismo (2019).