Answer: The main difference between the cranium and skull is that the skull is composed of both facial bones whereas the cranium is the upper part of the skull, composed of bones that do not move.
Your skull provides structure to your head and face while also protecting your brain. The bones in your skull can be divided into the cranial bones, which form your cranium, and facial bones, which make up your face. There are several types of bones within your body, including: long bones.
The cranium, is the part of the skull that encloses the brain—is sometimes called the braincase, but its intimate relation to the sense organs for sight, sound, smell, and taste and to other structures makes such a designation somewhat misleading.