BMW 4 Series Gran Coupe (2019) is 12 mm (0.47 inch) wider, 12 kg (26 lbs) lighter and has 178 liters (6.29 ft3) bigger cargo space than Cadillac CT4 (2021).
Cadillac CT4 (2021) is 114 mm (4.49 inch) longer and 33 mm (1.30 inch) higher than BMW 4 Series Gran Coupe (2019).