Cadillac CT6 (2017) is 38 mm (1.50 inch) longer and 926 kg (2,041 lbs) lighter than Mercedes GL-Class (2020).
Mercedes GL-Class (2020) 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 (2017).