Kia Rio (Hatchback) (2016) is 493 mm (19.41 inch) longer, 75 mm (2.95 inch) wider, 197 kg (434 lbs) lighter and has 37 liters (1.31 ft3) bigger cargo space than Seat Mii (2020).
Seat Mii (2020) is 23 mm (0.91 inch) higher than Kia Rio (Hatchback) (2016).