Comparing the two fragrances…

Givenchy

Kilesa
Xeryus
Éphémère
Only in Xeryus
Shared character
Both Xeryus and Éphémère feature a combination of bergamot, geranium, musk, amber, lily of the valley, petitgrain, and juniper berry. They share aromatic profiles including citrus, green, fresh, fresh spicy, and warm spicy accords.
How they differ
Xeryus contains a wide array of unique notes including jasmine, lemon, rose, ylang-ylang, sandalwood, oakmoss, vetiver, leather, clary sage, cinnamon, coriander, woody notes, violet leaves, lavender, tarragon, green notes, violet, carnation, cedar, frankincense, cyclamen, mandarin orange, cypress, basil, balsam fir, incense, mace, nutmeg flower, and nutmeg flower, resulting in floral, woody, spicy, and earthy accords. In contrast, Éphémère is characterized by cardamom, lily, spearmint, and honey, which contribute to amber and white floral accords.
Who each suits
Xeryus may suit those who prefer complex profiles involving woody, earthy, leather, and diverse spicy and floral elements. Éphémère may suit those who prefer profiles featuring honey, spearmint, and white floral accords.