Hyundai i30 (2015) is 30 mm (1.18 inch) higher, 87 kg (192 lbs) lighter and has 51 liters (1.80 ft3) bigger cargo space than Mazda 3 (Hatchback) (2020).
Mazda 3 (Hatchback) (2020) is 160 mm (6.30 inch) longer and 15 mm (0.59 inch) wider than Hyundai i30 (2015).