Kia Rio (Hatchback) (2017) is 10 mm (0.39 inch) higher and 280 kg (617 lbs) lighter than Mazda 3 (Sedan) (2018).
Mazda 3 (Sedan) (2018) is 611 mm (24.06 inch) longer, 76 mm (2.99 inch) wider and has 131 liters (4.63 ft3) bigger cargo space than Kia Rio (Hatchback) (2017).