Arome 3 is a Aromatic Fougère that starts of somewhat strongly with a sharp lavender accord but which dries down to probably one of a handful of the most smooth, heavenly musky, and slighty woody lavender accords one is ever likely to find in. In short, it is absolutely exquisite.
Arome 3 Tradition differs significantly from Arome 3 to be considered an entirely different fragrance. Whereas, Arome 3 is an Aromatic Fougère, Arome 3 Tradition is more of an Oriental Fougère with a balsamic chypre base. The lavender on top and throughout the drydown is even sharper than it is in Arome 3 and is blended with citrus with a slight touch of fruitiness (the latter two elements are not present in Arome 3’s top notes). The middle notes are a spicy floral blend (no spice in Arome 3), and the basenotes are vetiver, gaiac wood, amber, and melded with that characteristic D’Orsay balsamic chypre accord. Arome 3 Tradition is definitely not musky in the drydown, and overall it has a higher, sharper aromatic pitch than Arome 3 and is, of course, given the chypre element, more on the powdery side in the drydown. Like all D’Orsays it is masterfully blended, and, like all D’Orsays, this one also gives one a sense that it’s a fragrance from a bygone era of grand perfumery despite the fact that it was created in 1998.
Finally, the pyramid for Arome 3 in the Basenotes directory is incorrect; it's really the pyramid for Arome 3 Tradition.
I hope this helps.
P.S. On a personal note: It's pretty appalling to see how little interest the D'Orsay line gets. It's understandable though given how persistently gah gah and provincial many people are with their complacency over the established niche brands but regrettable, nevertheless. The truth of this last statement will be confirmed by the small number of views and replies this thread will actually receive.