GMC Yukon XL (2017) is 510 mm (20.08 inch) longer, 114 mm (4.49 inch) wider and has 1505 liters (53.15 ft3) bigger cargo space than Mercedes G-Class (2020).
Mercedes G-Class (2020) is 79 mm (3.11 inch) higher and 238 kg (525 lbs) lighter than GMC Yukon XL (2017).