McLaren 570GT (2017) is 239 mm (9.41 inch) longer, 316 mm (12.44 inch) wider and has 29 liters (1.02 ft3) bigger cargo space than Mercedes A-Class (2020).
Mercedes A-Class (2020) is 232 mm (9.13 inch) higher and 100 kg (220 lbs) lighter than McLaren 570GT (2017).