Kia Optima Sportswagon (2015) is 85 mm (3.35 inch) longer and 345 kg (761 lbs) lighter than Lexus GX (2018).
Lexus GX (2018) is 25 mm (0.98 inch) wider, 224 mm (8.82 inch) higher and has 769 liters (27.16 ft3) bigger cargo space than Kia Optima Sportswagon (2015).