What is the difference between using sub cake flour and all-purpose flour in baking?

The main difference between using cake flour and all-purpose flour in baking is their protein content. Cake flour has less protein than all-purpose flour, which results in a lighter and more tender texture in baked goods like cakes and pastries. All-purpose flour, on the other hand, has a higher protein content, which can result in a denser and chewier texture in baked goods.