McLaren 720S (2020) is 169 mm (6.65 inch) wider and 633 kg (1,396 lbs) lighter than Mercedes GLC-Class (2020).
Mercedes GLC-Class (2020) is 113 mm (4.45 inch) longer, 463 mm (18.23 inch) higher and has 147 liters (5.19 ft3) bigger cargo space than McLaren 720S (2020).