GMC Yukon XL (2018) is 1044 mm (41.10 inch) longer, 155 mm (6.10 inch) wider, 231 mm (9.09 inch) higher and has 1822 liters (64.34 ft3) bigger cargo space than Mercedes GLC-Class (2017).
Mercedes GLC-Class (2017) is 445 kg (981 lbs) lighter than GMC Yukon XL (2018).