GMC Yukon XL (2018) is 845 mm (33.27 inch) longer, 185 mm (7.28 inch) wider, 420 mm (16.54 inch) higher and has 1732 liters (61.16 ft3) bigger cargo space than Kia Optima Sportswagon (2017).
Kia Optima Sportswagon (2017) is 830 kg (1,830 lbs) lighter than GMC Yukon XL (2018).