Kia Optima Sportswagon (2017) is 5 mm (0.20 inch) longer, 39 mm (1.54 inch) wider, 20 mm (0.79 inch) higher and has 10 liters (0.35 ft3) bigger cargo space than Lexus GS (2020).
Lexus GS (2020) is 105 kg (231 lbs) lighter than Kia Optima Sportswagon (2017).