What shell is harder a armadillo or turtle shell?

A turtle's shell is generally harder than an armadillo's shell, but the exact level of hardness can vary depending on the species and the specific structure of the shell. Turtle shells are composed of bone and cartilage covered with scales, while armadillo shells are composed of interlocking bone plates called osteoderms covered in a layer of skin. Turtle shells are typically more rigid and impact-resistant, providing excellent protection against predators and other threats, while armadillo shells offer more flexibility and mobility.