One refers to being addressed in writing and one refers to address in conversation.
Thus Priest in conversation is addressed as Father, but in correspondence is addressed as Reverend.
Bishops (depending on the country) are addressed as Your Excellency in conversation, but Most Reverend in conversation.
Deacons are usually referred to as Deacon in conversation, and may be styled Revered Mister in writing although some diocese reserve this to transitional deacons. The usage is inconsistent.
When you throw in Archbishops and Bishops from other countries and Monsignors it can get more confusing.
If you see a man in a roman collar and you want to speak with him, it never hurts to address them as Father. A deacon will be flattered and will probably correct you. A Bishop will probably understand you don’t know the difference.