McLaren 650S Coupe (2015) is 162 mm (6.38 inch) wider and 1000 kg (2,205 lbs) lighter than Mercedes G-Class (2018).
Mercedes G-Class (2018) is 157 mm (6.18 inch) longer, 766 mm (30.16 inch) higher and has 523 liters (18.47 ft3) bigger cargo space than McLaren 650S Coupe (2015).