BMW 8 Series (G15) (2018) is 187 mm (7.36 inch) longer, 12 mm (0.47 inch) wider, 176 kg (388 lbs) lighter and has 70 liters (2.47 ft3) bigger cargo space than Mercedes GLC-Class (2020).
Mercedes GLC-Class (2020) is 318 mm (12.52 inch) higher than BMW 8 Series (G15) (2018).