They are different than last year but I'm not sure better. Not worse either though. Matthews is what matters. How hurt was he playing last year? And if he was hurt is he back to full strength?
If is drop-off in production last year was due to a lingering injury, and he is back to full strength, they are a slightly better (and different) team than last year. (possibly a 115+ point team)
However, if his performance last year was more indicative of who he is and the year before was just his 'career' year, then they are likely the same as last year in terms of how good they are.
I'm leaning more toward the first one, and betting on Matthews being closer to what he was 2 years ago than last year, and thus the team being somewhat better (but not a lot better).
As for the Division, I think Buffalo is still a year away from contending with the Leafs. Power is only in his 2nd year and as much talent as he has on the backend, D-men usually take a few season to reach their potential. They have big time questions in net, and the forward group is just still so young. I think Buf will eventually be a bigger threat than Ottawa, but I think Ottawa is a step ahead of Buffalo next year and ultimatly more likley to challenge the Leafs and Florida for the top spot in the division.