BMW X6 (2019) is 14 mm (0.55 inch) wider, 58 mm (2.28 inch) higher, 310 kg (683 lbs) lighter and has 127 liters (4.48 ft3) bigger cargo space than Rolls-Royce Phantom (2017).
Rolls-Royce Phantom (2017) is 907 mm (35.71 inch) longer than BMW X6 (2019).