The JIRA Administrators have 2 levels, JIRA Administrator and JIRA System Administrator (higher). They are defined in the JIRA Global Permissions. The different is detailed on the link below (i'm not sure on the billing information) but it will be best if you can test with 2 accounts and see if you are happy with it.
As a Jira power user, I was at first doubtful that Trello could benefit my workflow. Jira already uses boards (ones you can customize!), so why would I even need to use Trello?! In this post you will...
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