What perfumes are similar to Century XXI?

Fragrances with the closest accord profile to Century XXI by BARRE: Sonic Flower by Room 1015; Missing Person by Phlur; L'Eau Papier by Diptyque. Each is selected by cosine similarity on accord strengths and shared notes.

Why are these perfumes considered similar?

Similarity is computed from three signals: (1) cosine similarity between accord strength vectors, (2) Jaccard overlap on note sets across the pyramid, (3) a curated "often compared to" list from community mentions. The top matches blend all three.