Cadillac XTS (2015) is 722 mm (28.43 inch) longer, 18 mm (0.71 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 254 kg (560 lbs) lighter than Cadillac XTS (2015).