That is a difficult question. The answer depends on who you ask. Stage 2 and Chapter 2 are relatively the same worldwide. Stage 3 Chapter 3 are slightly different. The noise level requirements are roughly the same, but the way of recording and analyzing the data are not. Mostly due to the fact that them damn Europeans like to change the rules of the game after it has started and isn't panning out to their liking. Sorry to the EU people.
