Cadillac XTS (2017) is 714 mm (28.11 inch) longer, 49 mm (1.93 inch) wider, 7 mm (0.28 inch) higher and has 89 liters (3.14 ft3) bigger cargo space than Mercedes GLA-Class (2014).
Mercedes GLA-Class (2014) is 422 kg (930 lbs) lighter than Cadillac XTS (2017).