Frizz-Ease is a lot heavier in my opinion. Frizz Ease is good for making your hair stick straight (because it's heavy, it pulls it down). Phytodefrisant just gets rid of the frizz and is very lightweight, so it doesn't pull it down. I have straight hair, but there is a very miniscule amount of wave to it. When I use Phytodefrisant, I still have the wave in my hair. When I use Frizz Ease, I don't have the wave, it's stick straight.