BMW 3 Series Gran Turismo (2018) is 446 mm (17.56 inch) longer, 216 mm (8.50 inch) higher and has 335 liters (11.83 ft3) bigger cargo space than Toyota GR Supra (2020).
Toyota GR Supra (2020) is 32 mm (1.26 inch) wider and 106 kg (234 lbs) lighter than BMW 3 Series Gran Turismo (2018).