Cadillac ATS Coupe (2019) is 7 mm (0.28 inch) longer and 550 kg (1,213 lbs) lighter than Mercedes GLC-Class (2020).
Mercedes GLC-Class (2020) is 48 mm (1.89 inch) wider, 267 mm (10.51 inch) higher and has 56 liters (1.98 ft3) bigger cargo space than Cadillac ATS Coupe (2019).