FIAT 500X (2016) is 130 mm (5.12 inch) higher and 320 kg (705 lbs) lighter than Kia Optima Sportswagon (2017).
Kia Optima Sportswagon (2017) is 607 mm (23.90 inch) longer, 64 mm (2.52 inch) wider and has 90 liters (3.18 ft3) bigger cargo space than FIAT 500X (2016).