BMW 8 Series (G15) (2018) is 49 mm (1.93 inch) wider than Cadillac XTS (2016).
Cadillac XTS (2016) is 288 mm (11.34 inch) longer, 160 mm (6.30 inch) higher, 107 kg (236 lbs) lighter and has 90 liters (3.18 ft3) bigger cargo space than BMW 8 Series (G15) (2018).