Cadillac ATS (2017) is 233 mm (9.17 inch) longer than Mercedes GLA-Class (2018).
Mercedes GLA-Class (2018) is 28 mm (1.10 inch) wider, 191 mm (7.52 inch) higher, 42 kg (93 lbs) lighter and has 54 liters (1.91 ft3) bigger cargo space than Cadillac ATS (2017).