Cadillac CT6 (2016) is 496 mm (19.53 inch) longer, 70 mm (2.76 inch) wider, 62 mm (2.44 inch) higher and has 77 liters (2.72 ft3) bigger cargo space than Mercedes C-Class (Coupe) (2017).
Mercedes C-Class (Coupe) (2017) is 104 kg (229 lbs) lighter than Cadillac CT6 (2016).