FIAT 500X (2018) is 125 mm (4.92 inch) higher and 400 kg (882 lbs) lighter than Kia Optima Sportswagon (2018).
Kia Optima Sportswagon (2018) is 591 mm (23.27 inch) longer, 64 mm (2.52 inch) wider and has 90 liters (3.18 ft3) bigger cargo space than FIAT 500X (2018).