GMC Acadia (2017) is 336 mm (13.23 inch) longer, 137 mm (5.39 inch) wider, 395 kg (871 lbs) lighter and has 693 liters (24.47 ft3) bigger cargo space than Mercedes G-Class (2015).
Mercedes G-Class (2015) is 110 mm (4.33 inch) higher than GMC Acadia (2017).