BMW 8 Series (G14) (2020) is 79 mm (3.11 inch) longer, 88 mm (3.46 inch) wider and has 47 liters (1.66 ft3) bigger cargo space than Cadillac CT4 (2020).
Cadillac CT4 (2020) is 83 mm (3.27 inch) higher and 363 kg (800 lbs) lighter than BMW 8 Series (G14) (2020).