Cadillac STS (2018) is 39 mm (1.54 inch) higher and 191 kg (421 lbs) lighter than Mercedes S-Class Coupe (2015).
Mercedes S-Class Coupe (2015) is 60 mm (2.36 inch) longer, 63 mm (2.48 inch) wider and has 12 liters (0.42 ft3) bigger cargo space than Cadillac STS (2018).