What's the difference between meum and spignel?

Meum

---

Definition:

Example Sentences:

• (1) The rooms had many bookshelves and comfortable reading chairs, but the sleeping space was two woollen sleeping bags embroidered with the words meum and tuum – mine and yours – on a sort of leather shelf.

Spignel

---

Definition:

• (n.) Same as Spickenel.

Example Sentences: