BMW 8 Series (G15) (2019) is 334 kg (736 lbs) lighter than Mercedes X-Class (2020).
Mercedes X-Class (2020) is 497 mm (19.57 inch) longer, 18 mm (0.71 inch) wider, 478 mm (18.82 inch) higher and has 740 liters (26.13 ft3) bigger cargo space than BMW 8 Series (G15) (2019).