GMC Yukon (2021) is 479 mm (18.86 inch) longer, 185 mm (7.28 inch) wider, 473 mm (18.62 inch) higher and has 1503 liters (53.08 ft3) bigger cargo space than Kia Optima Sportswagon (2015).
Kia Optima Sportswagon (2015) is 940 kg (2,072 lbs) lighter than GMC Yukon (2021).