No more insults, this is a final warning.
Aren't all Bentleys and Rolls Royces hand-made, while S-classes are not? If so, this could provide a reason for the exceptionally high cost. But that's not to say that the british cars are overpriced; being hand-built does provide a heavy aspect of exclusivity--it's like comparing two identical multi-million dollar homes, one located on a cliff over-looking the sea, and one in the middle of the desert. The house with the view is obviously going to cost way more, even though both are technically identical within. In other words, you get what you pay for, which is an elite stature.
However, I would still take the S600 or CL600 (Benz's REAL flagship) simply because I happen to like sleepers, and the top of the line Mercedes cars just happen to be that. Furthermore, the Rolls and Bentleys are notoriously unreliable (well what do you expect, they're british machines), but then again, if I could afford one of 'em, why would I care about upkeep cost?
Recent news has it that the Mercedes Maybach limousine is ready to be produced. Yeah, it's not a driver's car, but we ARE talking about true top-of-the-line luxury, right? For more info about the Maybach, select this
thread.