McLaren 570S (2016) is 90 mm (3.54 inch) wider and 524 kg (1,155 lbs) lighter than Mercedes GLK-Class (2018).
Mercedes GLK-Class (2018) is 6 mm (0.24 inch) longer, 497 mm (19.57 inch) higher and has 230 liters (8.12 ft3) bigger cargo space than McLaren 570S (2016).