I'm no Trump fan, but there are many reasons why him running insecure servers for his current business isn't even close to Clinton running insecure servers when she was Secretary of State.
Someone who's running for president should be adhering to higher standards than regular people, not lower ones. Trump can have crap security right now; he's a private citizen, and there's no law against it (whether or not there should be is another question). Clinton can even have crap security on her personal servers. She just needs to know when to use which one. Really it was the greatest stroke of brilliance of the entire Clinton campaign to get the media to label the whole server / classified document situation as the "e-mail scandal" because it trivializes it and hides away what actually makes it significant.
For the record I'm not voting for either one.
Mediocrity finds safety in standardization. -- Frederick Crane