What's the difference between writability and writable?

Writability

---

Definition:

• (n.) Ability or capacity to write.

Example Sentences:

• (1) But to say that you have been changed by the work on a book – by the process of getting the book to be writable – is not bad.

Writable

---

Definition:

• (a.) Capable of, or suitable for, being written down.

Example Sentences:

• (1) But to say that you have been changed by the work on a book – by the process of getting the book to be writable – is not bad.