Similarity is based on note and accord overlap, not molecular analysis.
Differences come from accords and community votes on longevity and sillage.
The main accords of Opium Pour Homme are soft spicy and powdery. It opens with Black Currant and Star Anise, reveals Pepper and Galanga at its heart, and dries down to Bourbon Vanilla and Tolu Balsam. It lasts long and projects strongly; people reach for it in autumn and winter, mostly in the evening.
How a perfume unfolds →