To answer your question, basically almost everything has been reformulated today, because of restrictions/scarcity of materials (such as natural musk or ambergris etc) or purposeful elimination of allergens (like the IFRA guidelines demand).
I have not done a side by side comparison of the two, but have heard myself of reformulation on this by people who have been using it. Myself I always liked the original. Very macho!
The Concentree is another version with a slight re-orchastration. I know there are people who have been using it, so wait a bit and they will chime in.