Cadillac XTS (2014) is 586 mm (23.07 inch) longer, 212 mm (8.35 inch) higher and has 159 liters (5.62 ft3) bigger cargo space than Mercedes AMG GT (2014).
Mercedes AMG GT (2014) is 88 mm (3.46 inch) wider and 167 kg (368 lbs) lighter than Cadillac XTS (2014).