I would like to dedicate my first comment to one of my absolute favorite fragrances and hope to do him some justice and from you for some indulgence. I won't tell you much about the classic fragrance process about the different components, on the one hand you can read that in most comments anyway...

My three year old review still exists, and whilst I'd still say it's a beautiful fragrance, it now lasts less then an hour. The parfum is the better choice.