Cadillac XTS (2014) is 715 mm (28.15 inch) longer, 47 mm (1.85 inch) wider, 7 mm (0.28 inch) higher and has 88 liters (3.11 ft3) bigger cargo space than Mercedes GLA-Class (2015).
Mercedes GLA-Class (2015) is 417 kg (919 lbs) lighter than Cadillac XTS (2014).