Cadillac XTS (2015) is 476 mm (18.74 inch) longer, 283 kg (624 lbs) lighter and has 159 liters (5.62 ft3) bigger cargo space than Mercedes GLC-Class (2014).
Mercedes GLC-Class (2014) is 38 mm (1.50 inch) wider and 158 mm (6.22 inch) higher than Cadillac XTS (2015).