Fogging produces droplets that are smaller than 50 microns, while misting produces droplets that are larger than 50 microns. Fogging is typically used for disinfection purposes, as the small droplets can penetrate hard-to-reach areas and kill bacteria and viruses. Misting, on the other hand, is used for cooling or humidifying purposes, as the larger droplets can provide a refreshing mist without wetting surfaces.