Cadillac ATS (2018) is 97 mm (3.82 inch) longer, 131 mm (5.16 inch) higher, 40 kg (88 lbs) lighter and has 31 liters (1.09 ft3) bigger cargo space than Mercedes AMG GT (2016).
Mercedes AMG GT (2016) is 133 mm (5.24 inch) wider than Cadillac ATS (2018).