Cadillac CTS-V Coupe (2015) is 467 mm (18.39 inch) longer and 48 mm (1.89 inch) wider than Mercedes GLA-Class (2018).
Mercedes GLA-Class (2018) is 189 mm (7.44 inch) higher, 367 kg (809 lbs) lighter and has 138 liters (4.87 ft3) bigger cargo space than Cadillac CTS-V Coupe (2015).