Cadillac CT6 (2017) is 158 mm (6.22 inch) longer, 59 mm (2.32 inch) higher, 296 kg (653 lbs) lighter and has 33 liters (1.17 ft3) bigger cargo space than Mercedes S-Class Coupe (2016).
Mercedes S-Class Coupe (2016) is 17 mm (0.67 inch) wider than Cadillac CT6 (2017).