Pictures can sum up one's sentiments really well. Look at the two photos,one of the Australian and the other of the Indians running between the wickets (courtesy of CricInfo).
The Aussies are 34 and 31 years old, the Indians 35 and 34, so it is not a matter of youth and experience. The Australians know that they cannot match the Indians on paper, so they look to maximize any advantage they have. They are fitter, better runners and fielders, and seek to drive home that advantage every time. The teams that take care of the little details invariably come out on top in the long run (no pun intended).
I understand that the contexts when the two photos were taken are probably different but having watched the entire match, I can tell you that these typify the efforts of the two sides.
(Thanks are due to AV for bringing these photos to my attention).