Cadillac ATS (2014) is 107 mm (4.21 inch) longer and 376 kg (829 lbs) lighter than Mercedes GLK-Class (2018).
Mercedes GLK-Class (2018) is 34 mm (1.34 inch) wider, 279 mm (10.98 inch) higher and has 69 liters (2.44 ft3) bigger cargo space than Cadillac ATS (2014).