The foaming sprayer is more for products that foam obviously, ie car shampoo, TRC, wheel cleaner, ultra foam, rubber mat cleaner, stuff like that. While the multi sprayer is more of a mist that is constantly sprayed. You could put iron remover, detail spray, glass cleaner, things of that nature instead. I have not been able to find JUST the sprayer tips to switch out but i would like to get both tips so i can switch out thee purposes for the sprayer itself.