Kia Rio (Sedan) (2019) is 170 mm (6.69 inch) higher, 29 kg (64 lbs) lighter and has 23 liters (0.81 ft3) bigger cargo space than Mazda 3 (Hatchback) (2018).
Mazda 3 (Hatchback) (2018) is 76 mm (2.99 inch) longer and 71 mm (2.80 inch) wider than Kia Rio (Sedan) (2019).