McLaren GT (2020) is 306 mm (12.05 inch) longer, 235 mm (9.25 inch) wider, 58 kg (128 lbs) lighter and has 235 liters (8.30 ft3) bigger cargo space than Toyota GR Supra (2019).
Toyota GR Supra (2019) is 78 mm (3.07 inch) higher than McLaren GT (2020).