Hillary/DNC - e-mails about media interactions, financial contributions, personal info on donors, campaign info. More than likely done by the Russians.
Manning - Downloaded ~500000 documents related to the Iraq and Afgan engagements and over 250000 diplomatic pages. Within the pages of the diplomatic pages were names of foreign nationals that assisted in Military operations. I can only assume that since this information was made public, ISIS/bad guys/etc would use this info and take retribution on these individuals (though I do not believe that anyone has confirmed that any deaths were associated with his/her leaks) Some have also stated that these leaks were the catalyst behind the 'Arab Spring' in 2010.
Yes, some of the information that was leaked showed some situations that many, including me, found rather disturbing done by US Military personnel. But a US citizen acquiring classified information and leaking it would be detrimental to the country, its military operations, and the forces used in those operations. What's the worst that could come out of the Hillary/DNC hack...maybe identity fraud?
That's my two cents. I wasn't trying to be a dick about it, but I really don't see how these two situations are related unless a US citizen was found to be behind the DNC hacks.