Wear-time guides
How long does extrait de parfum last
Extrait de parfum is not a guarantee of all-day or next-day wear. It commonly describes a concentrated interpretation, but the exact composition and your application matter more than an assumed fixed number of hours.
A HUME Fragrance buying guide

Separate persistence and projection
A fragrance may remain noticeable up close without creating a strong surrounding trail. Decide which outcome you are evaluating before calling it long-lasting.
Compare the actual versions
An extrait may change the balance of notes rather than only concentration. Keep exact version names in the record so you are not comparing different products as identical formulas.
Choose for preferred wear
A lingering character you dislike is not a benefit. Record later enjoyment alongside presence so the longest trace does not automatically decide the purchase.
Try this before you buy
Compare the exact extrait's later scent and preferred presence rather than expecting its label to guarantee an hour total.