The cars tour the 20-plus-kilometre track at almost exactly the same rate, passing roadside features that are practically identical on each screen.
Denis Malevanyi, the driver in both vehicles, decided to conduct the interesting test by editing the two videos together so they were in sync, just to see the difference. But who would have thought they would have remained in sync almost the entire lap?
The only downside to this remarkable resemblance is the sound. You can easily hear the Gran Turismo 5 version and it sounds very digital. Is it that hard to mimic exact sounds of vehicles?
Take a look for yourself anyway, it's quite interesting to see what computer technology is capable of nowadays.