What's the difference between seignior and signior?

Seignior

Definition:

• (n.) A lord; the lord of a manor.
• (n.) A title of honor or of address in the South of Europe, corresponding to Sir or Mr. in English.

Example Sentences:

Signior

Definition:

• (n.) Sir; Mr. The English form and pronunciation for the Italian Signor and the Spanish Se–or.

Example Sentences: