Cadillac CTS (2015) is 674 mm (26.54 inch) longer, 54 mm (2.13 inch) wider, 20 mm (0.79 inch) higher and has 106 liters (3.74 ft3) bigger cargo space than Mercedes A-Class (2014).
Mercedes A-Class (2014) is 316 kg (697 lbs) lighter than Cadillac CTS (2015).