Cadillac CT6 (2018) is 38 mm (1.50 inch) longer and 917 kg (2,022 lbs) lighter than Mercedes GL-Class (2017).
Mercedes GL-Class (2017) is 118 mm (4.65 inch) wider, 377 mm (14.84 inch) higher and has 247 liters (8.72 ft3) bigger cargo space than Cadillac CT6 (2018).