Kia Rio (Hatchback) (2014) is 15 mm (0.59 inch) higher and 147 kg (324 lbs) lighter than Mazda 3 (Hatchback) (2018).
Mazda 3 (Hatchback) (2018) is 410 mm (16.14 inch) longer, 76 mm (2.99 inch) wider and has 76 liters (2.68 ft3) bigger cargo space than Kia Rio (Hatchback) (2014).