Actually, no. The Phantom competes with the Bentley Arnage, which was out long before the Flying Spur was. The Flying Spur and Phantom are in a completely different price range, with the Arnage T being the Phantom's main competitor for price.
But I'd say that the Continental Flying Spur costing half as much as the Phantom and Arnage is a rather noticable difference, super rich person or not.