Mercedes M-Class (2014) is 1247 mm (49.09 inch) longer, 281 mm (11.06 inch) wider, 310 mm (12.20 inch) higher and has 439 liters (15.50 ft3) bigger cargo space than Seat Mii (2020).
Seat Mii (2020) is 840 kg (1,852 lbs) lighter than Mercedes M-Class (2014).