Cadillac XTS (2014) is 722 mm (28.43 inch) longer, 17 mm (0.67 inch) wider and has 74 liters (2.61 ft3) bigger cargo space than Mercedes GLA-Class (2018).
Mercedes GLA-Class (2018) is 110 mm (4.33 inch) higher and 249 kg (549 lbs) lighter than Cadillac XTS (2014).