Mercedes S-Class (2016) is 415 kg (915 lbs) lighter than Rolls-Royce Phantom (2020).
Rolls-Royce Phantom (2020) is 526 mm (20.71 inch) longer, 118 mm (4.65 inch) wider, 156 mm (6.14 inch) higher and has 38 liters (1.34 ft3) bigger cargo space than Mercedes S-Class (2016).