Well, last year obviously. Other than a close series against a great Washington team, they just seemed to be able to overwhelm their opponents on a consistent basis, with wave after wave of attack and pressure. Last year, I though the Pens were even better than their record indicated, which is saying something.
This year, maybe the opposite, especially against Washington. I have no problem saying that they were outplayed / outclassed in the majority of games. But I also feel like they just have a winner's confidence this year. Doesn't really matter if you're outplayed if you win. The Pens this year take the ugly losses, and then when things tighten up, they respond. Up 3-1 against Washington, they played pretty poorly, but then had a fantastic Game 7. Up 3-0 last night, they played poorly, but as soon as the Preds tied it up they just went back to business.
But yeah, last year's team looked much better.