In the video we see in the runs from a roll that whomever gets the jump holds their lead. Now, the M5 has two passengers so without the passengers we would expect it to start a slow and steady pull versus the M3 the longer the race would go. From a stop however the M3 shows the advantage the DCT transmission has launching versus the M5's SMG managing to beat it.
Mods on the M5 are an Evolve R Tune and RPI Scoops. The M3 has RPI scoops, BMW Performance Exhaust, and a Gintani X-Pipe with high flow cats. Enjoy the race and we hope to see a rematch once the M3 gets a tune (and the M5 ditches the passengers).