BMW 8 Series (G14) (2018) is 200 mm (7.87 inch) longer and 96 mm (3.78 inch) wider than Cadillac ATS (2016).
Cadillac ATS (2016) is 81 mm (3.19 inch) higher, 418 kg (922 lbs) lighter and has 31 liters (1.09 ft3) bigger cargo space than BMW 8 Series (G14) (2018).