Kia Optima Sportswagon (2015) is 445 mm (17.52 inch) longer, 26 mm (1.02 inch) wider, 13 kg (29 lbs) lighter and has 118 liters (4.17 ft3) bigger cargo space than Mercedes GLA-Class (2017).
Mercedes GLA-Class (2017) is 141 mm (5.55 inch) higher than Kia Optima Sportswagon (2015).