YSL Nude Avant-Garde (91) is a warm pink with a luminous finish that is limited edition and retails for $38.00. In comparison, Givenchy Nude Cachemire (101) is a warm coral with a cream finish that is permanent and retails for $37.00.
Givenchy Nude Cachemire (101) is 80% similar — it is less shimmery, lighter, warmer.