In principle, both did the same thing. Martin, as a National Security Agency contractor, stored classified documents in his home, which was unauthorized. Clinton, as Secretary of State, stored classified documents on her personal server in her home. Again, unauthorized. On its face, it seems pretty much the same.
Legally, the big difference is this: Martin admitted he knew the documents were classified and admitted that what he did was wrong and illegal. Game over.
He should have “lawyered up” before opening his mouth. Or consulted Clinton.
….and this, in the context of recent polling that suggests that Clinton SHOULD have been indicted…. .
Something to be said for keeping your mouth shut. Some can do it, and some cannot. And its important.