Concur

concur [kənˈkɜː]

Definition of concur

verb (concurs, concurring, concurred)

[no object]

• 1be of the same opinion; agree:the authors concurred with the majority[with direct speech]:‘That’s right,’ the chairman concurred
•  (concur with) agree with (a decision or opinion):we strongly concur with this recommendation

• 2happen or occur at the same time; coincide:in tests, cytogenetic determination has been found to concur with enzymatic determination

• I'll concur with my fellow reviewers and say the V8 is probably unnecessary here.
• Much as I concur, I would amend that list to include a third thought: contrivance.
• Home Stagers concur that sellers don't get a second chance for a first impression.
• I concur with that concern completely but believe there are ways to ensure fairness.

What is the difference between agree and concur? Which is the more common to use? For instance, someone said something to me and I want to say that he is right. Should I say I agree with you or I concur with you?