[Stealth7]

This appears to be the same track on which they test all cars.

Both Steve S.'s professed love of the M5 (well deserved no doubt) and the video support a conclusion that he was driving the M5 significantly harder than the E63s. So in the particular test, I expect that there might have been more than 0.1 sec of difference if the E63s had been driven harder.

As many, many tests have now shown, the cars are so close that which car "wins" in a performance test will depend on many factors, including the day, conditions, drivers, nature of test, etc. Realistically, the choice may just be personal preference. The M5 does appear to have an edge for most comfy on "comfort" setting.

The M5 Competition Pkg (surely to be priced stiffly in the US) should help give the M5 an edge.