Hard to say.
Washington has done a better job of getting more out of their depth players and bringing in youth, while the Penguins old core guys seem to be aging better.
The Penguins have an extremely stale head coach that is hard to have any faith in.
With the big guys on both teams getting another year older, I'd be surprised to see either team make the playoffs. I wouldn't totally count out either team, but they'll likely need the east to really struggle like it did last season.