I am not going to say no because who is to say that those papers did not endanger the troops in Vietnam and even though some people may think of Snowden as some sort of whistleblower, he could have endangered us in some way but is hard to say for sure but I would not count it out.
Much like the paper running with the Pentagon Papers, Edward Snowden is responsible for traitorous actions towards the United States. At least with the Pentagon Papers it was in the interest of journalism and not so some idiot could fuel his own god complex, but the result is the same. When people doing things others aren't going to like have their methods of executing those things exposed, doing them is harder and they are endangered.
No, the release of the Pentagon Papers did not endanger the troops in Vietnam, just like the argument is made against Edward Snowden, because the actions in Vietnam were not as secretive as Snowden's information was. It was not a big secret what was going on in Vietnam. Snowden released information that really changed a lot of people's minds about the United States.
The release of the Pentagon Papers led to the end of the Vietnam War, which end up saving the lives of American troops. The public learned about the fraud and lies being reported in the war effort, and as a result they started to protest the war even more and demand an end to it.
The release of the Pentagon Papers in 1967 didn't endanger troops in Vietnam. Instead, it angered an already frustrated nation and made Lyndon Johnson look like a power-hungry mobster and a fool. It's no wonder Richard Nixon was elected in 1968! Edward Snowden's data release didn't endanger anyone--perhaps the writer of the question meant Pvt. Bradley Manning's WikiLeaks release as they may have endangered troops in Afghanistan. Snowden was more concerned with the NSA's data collection as opposed to secret documents about foreign dignitaries.