Mazda 3 (Sedan) (2017) is 283 mm (11.14 inch) longer, 153 mm (6.02 inch) higher, 236 kg (520 lbs) lighter and has 234 liters (8.26 ft3) bigger cargo space than Toyota GR Supra (2020).
Toyota GR Supra (2020) is 64 mm (2.52 inch) wider than Mazda 3 (Sedan) (2017).