Mazda 3 (Sedan) (2014) is 43 mm (1.69 inch) longer and 580 kg (1,279 lbs) lighter than Mercedes GLK-Class (2018).
Mercedes GLK-Class (2018) is 44 mm (1.73 inch) wider, 244 mm (9.61 inch) higher and has 31 liters (1.09 ft3) bigger cargo space than Mazda 3 (Sedan) (2014).