Comparing the two fragrances…

Cacharel

Shirley May
Promesse
Swear
Only in Promesse
Only in Swear
Shared character
Both Promesse and Swear feature a combination of jasmine, orchid, bergamot, mandarin orange, blackberry, sandalwood, cedar, musk, and amber. They share floral, citrus, woody, fruity, powdery, and white floral accords.
How they differ
Promesse includes notes of violet and blackcurrant, which contribute fresh, sweet, and violet accords. Swear is characterized by amber and musky accords.
Who each suits
Promesse suits those who prefer fresh, sweet, and violet-inflected profiles. Swear suits those who prefer amber and musky profiles.