Buick Regal TourX (2019) is 69 mm (2.72 inch) higher, 268 kg (591 lbs) lighter and has 200 liters (7.06 ft3) bigger cargo space than Mercedes S-Class Coupe (2020).
Mercedes S-Class Coupe (2020) is 40 mm (1.57 inch) longer and 35 mm (1.38 inch) wider than Buick Regal TourX (2019).