Main Difference
The main difference between Benediction and Invocation is that the Benediction is a short invocation for divine help, blessing and guidance and Invocation is a A gift
Benediction
A benediction (Latin: bene, well + dicere, to speak) is a short invocation for divine help, blessing and guidance, usually at the end of worship service. It can also refer to a specific Christian religious service including the exposition of the eucharistic host in the monstrance and the blessing of the people with it.
Invocation
An invocation (from the Latin verb invocare “to call on, invoke, to give”) may take the form of:
Supplication, prayer or spell.
A form of possession.
Command or conjuration.
Self-identification with certain spirits.These forms are described below, but are not mutually exclusive.
See also Theurgy.
Benediction (noun)
A short invocation for help, blessing and guidance from God, said on behalf of another person or persons (sometimes at the end of a church worship service).
“to pronounce / give / say the benediction; the nuptial benediction; a parting benediction”
“blessing”
Benediction (noun)
In the Anglican church, the ceremony used to institute an abbot, analogous to the consecration of a bishop.
Benediction (noun)
A Roman Catholic rite by which bells, banners, candles, etc., are blessed with holy water and formally dedicated to God.
Benediction (noun)
Help, good fortune or reward from God or another supernatural source.
“blessing|grace”
Invocation (noun)
The act or form of calling for the superior being, especially offered to a divine being.
Invocation (noun)
A call or demand, or order.
“the invocation of papers or evidence into court”
Invocation (noun)
An act of invoking or claiming a right.
Invocation (noun)
The act of invoking something, such as a function call.