Cadillac CT6 (2016) is 772 mm (30.39 inch) longer and 46 mm (1.81 inch) wider than Mercedes GLA-Class (2017).
Mercedes GLA-Class (2017) is 140 mm (5.51 inch) higher, 91 kg (201 lbs) lighter and has 2 liters (0.07 ft3) bigger cargo space than Cadillac CT6 (2016).