Comparing the two fragrances…

Curatrix

Dior
Flashback
Miss
Only in Flashback
Only in Miss
Shared character
Both Flashback and Miss feature a floral profile with shared notes of bergamot, mandarin, pink pepper, peony, vanilla, and moss.
How they differ
Flashback is characterized by citrus, fresh, mossy, rose, soft spicy, vanilla, and white floral accords, incorporating jasmine (sambac) and orange flower water. Miss is categorized by chypre, green, spicy, and animal accords, containing a wide array of notes including gardenia, sandalwood, patchouli (indonesia), iris / orris, neroli, musk, oakmoss, benzoin, rose (bulgaria), galbanum, tonka bean, lily of the valley, caramel, ambergris, apricot, rose (turkey), palisander rosewood, rose centifolia, rose (grasse), strawberry, cedarwood (alaska), dew drop, and blood orange.
Who each suits
Flashback suits those who prefer fresh, soft spicy, and white floral compositions. Miss suits those who prefer complex chypre, green, and animalic profiles.