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 Acqua di Parma Colonia are citrus and aromatic. Its key notes are Sicilian Citruses, Lavender, Lemon Verbena and Rosemary. It lasts a moderate time and projects moderately; people reach for it in spring and summer, mostly by day.
How a perfume unfolds →