Kia Optima Sportswagon (2017) is 199 mm (7.83 inch) longer, 385 kg (849 lbs) lighter and has 90 liters (3.18 ft3) bigger cargo space than Mercedes GLC-Class (2017).
Mercedes GLC-Class (2017) is 30 mm (1.18 inch) wider and 189 mm (7.44 inch) higher than Kia Optima Sportswagon (2017).