Mazda 6 (2015) is 454 mm (17.87 inch) longer, 5 mm (0.20 inch) wider, 121 kg (267 lbs) lighter and has 45 liters (1.59 ft3) bigger cargo space than Mercedes GLA-Class (2017).
Mercedes GLA-Class (2017) is 161 mm (6.34 inch) higher than Mazda 6 (2015).