Kia Optima Sportswagon (2015) is 230 mm (9.06 inch) longer, 82 mm (3.23 inch) wider, 15 mm (0.59 inch) higher and has 205 liters (7.24 ft3) bigger cargo space than Subaru Impreza GT (2017).
Subaru Impreza GT (2017) is 330 kg (728 lbs) lighter than Kia Optima Sportswagon (2015).