Personally I wouldn't call BS, as Egg Nog already pointed out there are way to many variables that factor in. These cars are very closely matched the RX having the edge in HP but the VW in torque.
In a street race anything can happen, a slight advantage at the light, the other driver shifting a few RPM too soon, one of the engines running a bit cooler than the other, and the all important "testicular factor" who has the
cajones to keep their foot into it longer.
The only way to offer up real proof is to meet up at a dragstrip, that timeslip is proof to anyone that on that day - with everything else being equal - you were the faster car, the next run might tell a different story, but when you win you win and no one(?) ever brags about losing.
BTW: I do not condone street-racing - been there, done that and will carry the mental scars forever. Keep it on the track, where the only person you may endanger is yourself.