See this thread http://www.basenotes.net/threads/251...auvage-Extreme
The ESE in the brown packaging is the original version. There is also the one in a black box which came afterwards. Not too much difference, but i would go for the brown box.
Re the new edition, why not go for variety and get Guerlain Homme Intense instead? IMO, it is a better interpretaion of the mint theme with less citrus than the new ESE which, with its mint, is now similar to GHI.