Cadillac CT6 (2020) is 803 mm (31.61 inch) longer, 76 mm (2.99 inch) wider and has 26 liters (0.92 ft3) bigger cargo space than Mercedes GLA-Class (2016).
Mercedes GLA-Class (2016) is 21 mm (0.83 inch) higher and 499 kg (1,100 lbs) lighter than Cadillac CT6 (2020).