The list of differences is huge, and as far as I know, never fully defined.
Nick is right about the H-60 being a screamer as far as single engine performance goes at the design weight. And definitely the helicopter I'd want to be in to go to war in anything other than a gunship role. But the failure modes of things like the stabiliator wouldn't pass the civil standards, for example.
On the other hand, lots of new military machines are required to meet civilian standards for reasons that have nothing to do with military requirements, and lots to do with reducing the cost of maintenance.