Cadillac ATS (2015) is 97 mm (3.82 inch) longer, 131 mm (5.16 inch) higher, 140 kg (309 lbs) lighter and has 31 liters (1.09 ft3) bigger cargo space than Mercedes AMG GT (2014).
Mercedes AMG GT (2014) is 133 mm (5.24 inch) wider than Cadillac ATS (2015).