Cadillac CTS-V (2017) is 602 mm (23.70 inch) longer and 30 mm (1.18 inch) wider than Mercedes GLA-Class (2015).
Mercedes GLA-Class (2015) is 41 mm (1.61 inch) higher, 485 kg (1,069 lbs) lighter and has 33 liters (1.17 ft3) bigger cargo space than Cadillac CTS-V (2017).