BMW 6 Series Gran Turismo (2018) is 406 mm (15.98 inch) longer, 325 mm (12.80 inch) higher and has 189 liters (6.67 ft3) bigger cargo space than McLaren GT (2020).
McLaren GT (2020) is 193 mm (7.60 inch) wider and 224 kg (494 lbs) lighter than BMW 6 Series Gran Turismo (2018).