Cadillac CTS-V (2014) is 313 mm (12.32 inch) longer, 166 mm (6.54 inch) higher and has 38 liters (1.34 ft3) bigger cargo space than Mercedes AMG GT (2015).
Mercedes AMG GT (2015) is 97 mm (3.82 inch) wider and 262 kg (578 lbs) lighter than Cadillac CTS-V (2014).