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 Byzance are warm spicy and white floral. It opens with Spices and Carnation, reveals Tuberose and Ylang-Ylang at its heart, and dries down to Sandalwood and Heliotrope. People reach for it in autumn and winter, mostly in the evening.
How a perfume unfolds →