Aftershave and eau de toilette are both grooming elements with different fragrances. The two substances have perfume oil in them, but with different concentrations. The aftershave perfume oil concentration ranges from one to three percent, while that of eau de toilette varies between four and eight percent.
Due to the difference in the perfume oil concentration, there will surely be a difference between the lasting duration of the substances. The aftershave usually last for about 2 to 3 hours, while the eau de toilette does last for about six to eight hours. The aftershave is usually applied to the skin after you might have shaved, and it does not irritate the skin.
The eau de toilette will most likely irritate your skin, and can end up leading to rashes or tending to change your skin into red color. On a general note, the aftershave is found to be cheaper than the eau de toilette.