Audi S8 (2016) is 29 mm (1.14 inch) wider than Mercedes X-Class (2017).
Mercedes X-Class (2017) is 193 mm (7.60 inch) longer, 351 mm (13.82 inch) higher, 836 kg (1,843 lbs) lighter and has 655 liters (23.13 ft3) bigger cargo space than Audi S8 (2016).