Cadillac CT6 (2017) is 592 mm (23.31 inch) longer, 110 mm (4.33 inch) wider, 43 mm (1.69 inch) higher and has 102 liters (3.60 ft3) bigger cargo space than Mercedes C-Class (Coupe) (2014).
Mercedes C-Class (Coupe) (2014) is 49 kg (108 lbs) lighter than Cadillac CT6 (2017).