BMW 8 Series (G15) (2020) is 5 mm (0.20 inch) wider, 126 kg (278 lbs) lighter and has 20 liters (0.71 ft3) bigger cargo space than Mercedes S-Class Coupe (2017).
Mercedes S-Class Coupe (2017) is 183 mm (7.20 inch) longer and 73 mm (2.87 inch) higher than BMW 8 Series (G15) (2020).