What is the difference between the ba and ka?

Answer 1

Ba was a musician and Ka was a sculpture

Answer 2

The BA was the ancient Egyptian name for that which makes a person or thing a unique individual, similar to what we would call the "personality." It was seen as the aspect of a person that would live after the body died

The KA was the ancient Egyptian concept equivalent to the vital essence, that which distinguishes the difference between a living and a dead person.

The modern Christian concept of soul may be thought of as combining these two concepts.