Cadillac XTS (2017) is 367 mm (14.45 inch) longer, 778 kg (1,715 lbs) lighter and has 23 liters (0.81 ft3) bigger cargo space than Mercedes G-Class (2015).
Mercedes G-Class (2015) is 14 mm (0.55 inch) wider and 453 mm (17.83 inch) higher than Cadillac XTS (2017).