GMC Yukon (2018) is 324 mm (12.76 inch) longer, 185 mm (7.28 inch) wider, 420 mm (16.54 inch) higher and has 1078 liters (38.07 ft3) bigger cargo space than Kia Optima Sportswagon (2015).
Kia Optima Sportswagon (2015) is 933 kg (2,057 lbs) lighter than GMC Yukon (2018).