BMW 8 Series (G14) (2020) is 22 mm (0.87 inch) wider than Cadillac CT6 (2016).
Cadillac CT6 (2016) is 348 mm (13.70 inch) longer, 132 mm (5.20 inch) higher, 279 kg (615 lbs) lighter and has 83 liters (2.93 ft3) bigger cargo space than BMW 8 Series (G14) (2020).