Lately I've been playing the Philip Island track on Superbike 2001 (as Troy Corser, yeah!). Man, this track is tough! There are several decreasing radius turns, one that goes over a hill. And the chicane gets me every time. The second turn is not as tight as the first and I end up pulling the bike over too far the opposite direction and running off the track on the *inside* of the second turn.
I can see where familiarity with the track would be a big advantage here, so I have to go with the two Aussie Troys as the favorites.