Comparing the two fragrances…

Lanvin

Weil
Arpège
Antilope
Only in Arpège
Shared character
Both Arpège and Antilope share a composition involving jasmine, rose, bergamot, sandalwood, neroli, musk, vetiver, amber, lily of the valley, ambergris, aldehydes, and iris. They are both characterized by floral, woody, chypre, aldehydic, spicy, fresh, powdery, and aromatic accords.
How they differ
Arpège features notes of tuberose, ylang-ylang, geranium, vanilla, iris/orris, benzoin, patchouli, coriander, peach, lily, honeysuckle, styrax, and camellia, resulting in amber, white floral, and yellow floral accords. Antilope includes cedarwood, oakmoss, clary sage, violet, carnation, spices, citrus fruits, and Russian leather, which contribute to animalic, earthy, and musky accords.
Who each suits
Arpège may suit those who appreciate a powdery, creamy, and floral-dominant composition with prominent jasmine, rose, and sandalwood. Antilope may suit those who prefer earthy, musky, and leathery profiles with woody and spicy elements.
Only in Antilope