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 XS 2018 are aromatic and fresh spicy. It opens with Mint and Bergamot, reveals Juniper Berries and Coriander at its heart, and dries down to Rosemary and Oakmoss. People reach for it in spring and summer, mostly by day.
How a perfume unfolds →