Mazda 6 Atenza (2020) is 16 mm (0.63 inch) longer, 275 mm (10.83 inch) higher, 163 kg (359 lbs) lighter and has 336 liters (11.87 ft3) bigger cargo space than Toyota GR Supra (2020).
Toyota GR Supra (2020) is 64 mm (2.52 inch) wider than Mazda 6 Atenza (2020).