You can see the version history for JIRA Software at https://confluence.atlassian.com/jirasoftware/jira-software-7-0-x-release-notes-776997721.html and for JIRA 6.X at https://confluence.atlassian.com/jira/jira-release-summary-159154300.html.
These also describe what was different between the versions - a clear note of warning for version 7.0.8 on mySQL but apart from that all versions should be stable.
"Stability" is pretty much irrelevant in this choice, you really should be making the choice based on requirements (although, I tend to avoid the very first release of a major version - 7.0.1) I'd always recommend 7.0.latest over 6.x though, as it's got better functions, and you'll end up upgrading the 6.4 to a later version eventually, might as well do it now.
Hey Community mates! Claire here from the Software Product Marketing team. We all know software development changes rapidly, and it's often tough to keep up. But from our research, we've found the h...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs