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 First are floral and green. It opens with Aldehydes and Bergamot, reveals Narcissus and Hiacynth at its heart, and dries down to Civet and Oakmoss. It lasts long and projects strongly; people reach for it in spring and autumn, day or night.
How a perfume unfolds →