Mercedes M-Class (2014) is 142 mm (5.59 inch) higher, 410 kg (904 lbs) lighter and has 152 liters (5.37 ft3) bigger cargo space than Rolls-Royce Phantom (2019).
Rolls-Royce Phantom (2019) is 967 mm (38.07 inch) longer and 91 mm (3.58 inch) wider than Mercedes M-Class (2014).