Mercedes GL-Class (2015) is 42 mm (1.65 inch) wider, 27 mm (1.06 inch) higher and has 325 liters (11.48 ft3) bigger cargo space than Mercedes GLS-Class (2021).
Mercedes GLS-Class (2021) is 189 mm (7.44 inch) longer and 135 kg (298 lbs) lighter than Mercedes GL-Class (2015).