Rock buns and scones differ in texture, shape, and preparation. Rock buns have a rough, crumbly exterior with an irregular, rock-like shape and a denser interior. They are typically made by rubbing butter into flour and spooning the dough onto a baking tray. Scones, on the other hand, are softer, fluffier, and more uniform in shape, often cut into rounds or triangles. Scones are made by cutting very cold butter into the flour.