Why does petrification usually produce fosssils with more information than fossil casts?

Petrification typically produces fossils with more information because it involves the replacement of organic material with minerals, preserving fine details of the original structure at a microscopic level. This process often retains cellular structures, textures, and chemical compositions, providing a more comprehensive view of the organism's anatomy. In contrast, fossil casts are formed when sediment fills in an impression of an organism, which can lead to the loss of intricate details and contextual information about the original specimen. As a result, petrified fossils offer richer and more informative insights into past life forms.