Mercedes GL-Class (2017) is 688 mm (27.09 inch) longer, 195 mm (7.68 inch) wider, 580 mm (22.83 inch) higher and has 496 liters (17.52 ft3) bigger cargo space than Porsche 718 Cayman (2020).
Porsche 718 Cayman (2020) is 1129 kg (2,489 lbs) lighter than Mercedes GL-Class (2017).