Kia Optima Sportswagon (2017) is 21 mm (0.83 inch) wider and 20 mm (0.79 inch) higher than Mazda 6 (2017).
Mazda 6 (2017) is 40 mm (1.57 inch) longer, 206 kg (454 lbs) lighter and has 40 liters (1.41 ft3) bigger cargo space than Kia Optima Sportswagon (2017).
