BMW 8 Series (G15) (2018) is 3 mm (0.12 inch) wider and 221 kg (487 lbs) lighter than Mercedes S-Class (2019).
Mercedes S-Class (2019) is 402 mm (15.83 inch) longer, 149 mm (5.87 inch) higher and has 80 liters (2.83 ft3) bigger cargo space than BMW 8 Series (G15) (2018).