Cadillac CT6 (2019) is 201 mm (7.91 inch) longer, 59 mm (2.32 inch) higher, 142 kg (313 lbs) lighter and has 47 liters (1.66 ft3) bigger cargo space than Mercedes S-Class Coupe (2015).
Mercedes S-Class Coupe (2015) is 17 mm (0.67 inch) wider than Cadillac CT6 (2019).