I have spay starch, spay sizing, Flatter, Terial, Best Press, Acorn, Magic Premium Crafting and Quilting spray, Sta Flo, vodka/water mix and several boxes of starch powder. I can compare any one to any one. For stiffer than starch I use Terial especially when there is bias. When I started adding a little Sta Flo to each of the other sprays in bottles, they all improved.