Cadillac XTS (2016) is 585 mm (23.03 inch) longer, 212 mm (8.35 inch) higher and has 160 liters (5.65 ft3) bigger cargo space than Mercedes AMG GT (2015).
Mercedes AMG GT (2015) is 86 mm (3.39 inch) wider and 172 kg (379 lbs) lighter than Cadillac XTS (2016).