BMW 8 Series (G14) (2020) is 22 mm (0.87 inch) wider than Cadillac CT6 (2019).
Cadillac CT6 (2019) is 393 mm (15.47 inch) longer, 134 mm (5.28 inch) higher, 125 kg (276 lbs) lighter and has 97 liters (3.43 ft3) bigger cargo space than BMW 8 Series (G14) (2020).