Mercedes G-Class (2019) is 291 mm (11.46 inch) longer, 131 mm (5.16 inch) wider, 676 mm (26.61 inch) higher and has 505 liters (17.83 ft3) bigger cargo space than Porsche Cayman (2020).
Porsche Cayman (2020) is 1063 kg (2,344 lbs) lighter than Mercedes G-Class (2019).