BMW 1 Series (2014) is 19 mm (0.75 inch) higher, 50 kg (110 lbs) lighter and has 66 liters (2.33 ft3) bigger cargo space than Cadillac ATS Coupe (2018).
Cadillac ATS Coupe (2018) is 303 mm (11.93 inch) longer and 94 mm (3.70 inch) wider than BMW 1 Series (2014).