Cadillac XTS (2019) is 557 mm (21.93 inch) longer, 212 mm (8.35 inch) higher and has 159 liters (5.62 ft3) bigger cargo space than Mercedes AMG GT (2015).
Mercedes AMG GT (2015) is 87 mm (3.43 inch) wider and 179 kg (395 lbs) lighter than Cadillac XTS (2019).