I am trying to get some data from Jira, but can't understand the different as mentioned in Question above.
Example of query:
created >= 2021-01-01 AND created <= 2022-02-22 and watcher in ("userA", "userB", "userC")
created >= 2021-01-01 AND created <= 2022-02-22 AND issue in commentedByUser("userA", "userB", "userC")