Kia Rio (Hatchback) (2016) is 5 mm (0.20 inch) higher and 396 kg (873 lbs) lighter than Mazda 6 (2017).
Mazda 6 (2017) is 845 mm (33.27 inch) longer, 119 mm (4.69 inch) wider and has 192 liters (6.78 ft3) bigger cargo space than Kia Rio (Hatchback) (2016).