Thanks for the comments guys.

As for the video well the two car run down a runway turn around and then floor in second gear. The camera view is from the RUF passenger seat looking at the side view of the Brabus. The Ruf wins by approximately 5-10 car lengths. But IMO it did well, why? Here's why...

AMS timed the 640bhp SV12 doing 0-300km/hr in 43 seconds (186mph)

Another guy on the AMG board said it will take a Brabus K8 SL55 with 550bhp and 780Nm to do 0-300km/hr in 35-37 seconds...

CF and RC from here have said a standard V8 kompressor 500bhp vehicle will do 0-300 in about 43-48 seconds...

I have personally seen videos of this same RUF Porsche doing 0-190mph in 32 seconds... so at the final trap speeds in the video, The Brabus was 184mph and the RUF at 200mph exactly. In theory the 0-300 time of 43 seconds, vs sub 30 seconds for the RUF, the Brabus must be a mile behind, but it still manages to keep up to the much lighter Porsche albeit by some car lengths.