Have you watched the documentary "citizen four" about snowden? The way that they went about these releases are worlds apart and each man has his own clear agenda. Snowdens behavior set a good precedent for future leaking. For example, he was careful to do diligence to make sure no one agents would be harmed. This is important because much of the legal case against this sort of action claims (wrongly) that leaking is somehow treasonous no matter what because it endangers IC field agents.
All of this said, broadly, the world Assange wants to build is bad and the world Snowden wants to build is good. This matters and is part of why I call Assange a bad actor: it's not the act of releasing sensitive data its what he intended to do with it. (And to be clear, i'm no fan of Clinton.)