BMW 8 Series (G14) (2019) is 50 mm (1.97 inch) wider than Cadillac XTS (2015).
Cadillac XTS (2015) is 289 mm (11.38 inch) longer, 162 mm (6.38 inch) higher, 106 kg (234 lbs) lighter and has 159 liters (5.62 ft3) bigger cargo space than BMW 8 Series (G14) (2019).