McLaren GT (2020) is 198 mm (7.80 inch) wider, 379 kg (836 lbs) lighter and has 20 liters (0.71 ft3) bigger cargo space than Mercedes S-Class Coupe (2016).
Mercedes S-Class Coupe (2016) is 342 mm (13.46 inch) longer and 200 mm (7.87 inch) higher than McLaren GT (2020).