Why Does The BMW M2 Smash The Audi RS3 With Rolling Start?

If you were to look at the specs of the two machines in the video below you would expect the race to be a lot closer would you not?

The Audi RS3 packs 360 hp (270 kW) from a 2.5-litre turbocharged 5-cylinder and the BMW M2 packs 365 hp (272 kW) from a 3.0-litre straight-six turbocharged unit. 0 to 100 km/h in the Audi is dealt with in just 4.3 seconds which is the same as the M2 but this example is apparently a Manual which claims a sprint time of 4.5 seconds.

Why would the manual M2 give the RS3 such a wholopping from a rolling start? I am quite sure the Audi would teach the little manual Bimmer a lesson from standstill but this was a big surprise for me.