Kia Optima Sportswagon (2018) is 580 mm (22.83 inch) longer and 95 mm (3.74 inch) wider than Mazda CX-3 (2015).
Mazda CX-3 (2015) is 65 mm (2.56 inch) higher, 526 kg (1,160 lbs) lighter and has 64 liters (2.26 ft3) bigger cargo space than Kia Optima Sportswagon (2018).