BMW 8 Series (G14) (2020) is 191 mm (7.52 inch) longer and 96 mm (3.78 inch) wider than Cadillac ATS (2018).
Cadillac ATS (2018) is 81 mm (3.19 inch) higher, 328 kg (723 lbs) lighter and has 31 liters (1.09 ft3) bigger cargo space than BMW 8 Series (G14) (2020).