Mercedes X-Class (2017) is 1783 mm (70.20 inch) longer, 275 mm (10.83 inch) wider, 341 mm (13.43 inch) higher and has 909 liters (32.10 ft3) bigger cargo space than Seat Mii (2020).
Seat Mii (2020) is 848 kg (1,870 lbs) lighter than Mercedes X-Class (2017).