EDT vs EDP: what actually lasts longer
EDT (eau de toilette) and EDP (eau de parfum) are labels for fragrance concentration: the proportion of perfume oils to alcohol and water. As a rough guide, an EDT is usually around 5–15% perfume oil, an EDP around 15–20%, and a parfum or extrait higher still. The higher the concentration, the more material sits on your skin — which is why an EDP generally lasts longer and projects more strongly than the EDT of the same scent.
But the label is only part of the story. The ingredients themselves matter just as much. A composition built around woods, resins, amber, and musks will outlast a bright citrus EDT no matter what the concentration says. Some EDTs wear like EDPs; some EDPs fade within hours. The name tells you the dilution, not the durability.
Your skin changes the picture too. Fragrance evaporates faster on dry skin than on moisturized skin, and body chemistry makes the same scent read differently from one person to the next. If a favorite fades quickly on you, try applying it to moisturized skin, to pulse points like the neck and wrists, or on clothing (testing first for staining), where it evaporates more slowly.
When you are choosing between the two versions of one scent, sample both if you can. The EDT often smells fresher and lighter because of its higher alcohol content, while the EDP can feel deeper and rounder. Neither is better — they are different experiences of the same idea. And whatever you buy, a bottle kept away from heat and light will perform the way it was meant to far longer than one stored on a sunny shelf.