In the first run the M6 takes a huge jump. It isn't much of a race due to the M6 starting early. The second run is a much better race although again the M6 is starting on the second honk (it is pretty lame when people don't race fair). The cars are even through the gear but by 100 miles per hour the M6 is starting to pull. It continues to pull past up to 150 and the race is over.
The video thanks PP-Performance and many of these PP-P videos released appear to be marketing driven. It is no surprise to see the M6 take the win on the highway against the heavier all wheel drive E63 although some data and posting races of even starts instead of when one car cheats certainly would be better to see.