The core difference
Libre is defined by the contrast of French lavender, Moroccan orange blossom and warm vanilla. La Vie Est Belle focuses more on iris, earthy patchouli, warm vanilla and spun sugar, making the gourmand direction more obvious.
Which is less sweet?
Libre generally opens more aromatic and floral, keeping tension between lavender, orange blossom and vanilla. La Vie Est Belle places vanilla and spun sugar much closer to the center of the experience, so it reads sweeter and fuller.
Which feels more powdery?
The iris accord in La Vie Est Belle can give it a softer, more powdery texture. Libre is more about aromatic lavender and floral contrast than a powdery effect.
Day or evening?
Both can be worn across different times, but Libre can be easier for someone who wants a day-to-evening fragrance without strong gourmand sweetness. La Vie Est Belle is the more obvious choice if you want warmth and sweetness, especially in mild or cool weather.
How to choose
Choose Libre if lavender, orange blossom and vanilla appeal to you. Choose La Vie Est Belle if iris, patchouli and a sweeter vanilla-spun-sugar profile are closer to your taste.