BMW 8 Series (G15) (2020) is 200 mm (7.87 inch) longer, 96 mm (3.78 inch) wider and has 39 liters (1.38 ft3) bigger cargo space than Cadillac ATS (2018).
Cadillac ATS (2018) is 79 mm (3.11 inch) higher and 219 kg (483 lbs) lighter than BMW 8 Series (G15) (2020).