Yeah, a classic video. Not suprising as this is just a high speed run with 2 cars of similar power and weight, this probably all comes down to reaction time, etc.
The V8 R8 is faster around a road track as proven by runs on Top Gear test track, Nurburgring, and Road and Track 2009 test on Auto-X, oval, and road race:
http://www.roadandtrack.com/tests/co...ate-track-test
This is a better comparison as the cars are driven by the same driver in each test