Steelers or Penguins?

Who is more likely to repeat as champions this year the Penguins or the Steelers?

Though both teams had very little roster turn over from there championship seasons last year, I believe the Penguins have a much better chance of repeating (below is a list of my reasons).

1. I think it is harder to win a super bowl than a Stanly Cup because each series is a best of 7 in hockey where in football you only get one chance. Over a 7 game series the better team usually wins.

2. As great as the Steelers super star players are ( #7, #43, #92) they are not even considered the best in the league. The Penguins super stars ( #87, #71) are considered to be 2 of the 3 best players in the world and there is a wide gap between number 3 and 4.