BMW 8 Series (G15) (2019) is 3 mm (0.12 inch) wider and 321 kg (708 lbs) lighter than Mercedes S-Class (2014).
Mercedes S-Class (2014) 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) (2019).