BMW 3 Series Gran Turismo (2021) is 448 mm (17.64 inch) longer, 217 mm (8.54 inch) higher, 49 kg (108 lbs) lighter and has 336 liters (11.87 ft3) bigger cargo space than Toyota GR Supra (2019).
Toyota GR Supra (2019) is 31 mm (1.22 inch) wider than BMW 3 Series Gran Turismo (2021).