Mazda 3 (Hatchback) (2014) is 82 mm (3.23 inch) longer, 163 mm (6.42 inch) higher, 329 kg (725 lbs) lighter and has 179 liters (6.32 ft3) bigger cargo space than Toyota GR Supra (2018).
Toyota GR Supra (2018) is 64 mm (2.52 inch) wider than Mazda 3 (Hatchback) (2014).