Cadillac CTS (2015) is 420 mm (16.54 inch) longer, 164 mm (6.46 inch) higher and has 97 liters (3.43 ft3) bigger cargo space than Mercedes AMG GT (2018).
Mercedes AMG GT (2018) is 105 mm (4.13 inch) wider and 66 kg (146 lbs) lighter than Cadillac CTS (2015).