A question and practicing words

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Oct 11, 2018 10:34
What is the difference between "To narrow differences with A over B" and "To narrow differences over A"?

These below sentences are my practice.
I held a rally yesterday.

If I had researched more information about last sightseeing, I could have visited particular places.

shortlist sb for sth
My partner often shortlists me on our synchronized icloud calendar for our new events.

President disclosed that he is eager to deny a tariff.

berief A on sth
Prime minister ordered his secretary A that A briefed him on the last 2 sides meeting