McLaren 570S (2016) is 40 mm (1.57 inch) wider and 744 kg (1,640 lbs) lighter than Mercedes GLC-Class (2016).
Mercedes GLC-Class (2016) is 126 mm (4.96 inch) longer, 457 mm (17.99 inch) higher and has 130 liters (4.59 ft3) bigger cargo space than McLaren 570S (2016).