Cadillac CTS-V (2014) is 466 mm (18.35 inch) longer and 56 mm (2.20 inch) wider than Mercedes B-Class (2018).
Mercedes B-Class (2018) is 102 mm (4.02 inch) higher, 512 kg (1,129 lbs) lighter and has 98 liters (3.46 ft3) bigger cargo space than Cadillac CTS-V (2014).