GMC Terrain (2017) is 38 mm (1.50 inch) longer, 720 kg (1,587 lbs) lighter and has 1125 liters (39.73 ft3) bigger cargo space than Mercedes G-Class (2018).
Mercedes G-Class (2018) is 82 mm (3.23 inch) wider and 285 mm (11.22 inch) higher than GMC Terrain (2017).