BMW 8 Series (G14) (2020) is 20 mm (0.79 inch) wider than Mercedes CLS-Class (2020).
Mercedes CLS-Class (2020) is 106 mm (4.17 inch) longer, 78 mm (3.07 inch) higher, 158 kg (348 lbs) lighter and has 170 liters (6.00 ft3) bigger cargo space than BMW 8 Series (G14) (2020).