GMC Terrain (2020) is 214 mm (8.43 inch) higher, 78 kg (172 lbs) lighter and has 1352 liters (47.75 ft3) bigger cargo space than Kia Optima Sportswagon (2020).
Kia Optima Sportswagon (2020) is 148 mm (5.83 inch) longer and 11 mm (0.43 inch) wider than GMC Terrain (2020).