McLaren GT (2020) is 28 mm (1.10 inch) longer, 205 mm (8.07 inch) wider, 529 kg (1,166 lbs) lighter and has 70 liters (2.47 ft3) bigger cargo space than Mercedes GLC-Class (2014).
Mercedes GLC-Class (2014) is 445 mm (17.52 inch) higher than McLaren GT (2020).