I would tend to pick the Patriots due to home field advantage, but the Ravens are very good (probably better than the Pats defensively), and I think offensively the Ravens are putting a better team on the field than what they did last year, even if their OC got fired. And actually the offense has played well since they made the switch at OC. The Patriots will also be without the very difficult to cover Gronkowski, who is a big loss. I still don't understand how he broke the same arm again? Was he rushed back or does he have brittle bones/vitamin D deficiency? The tackle on which he broke the arm did not seem very violent.
I think the Patriots secondary will be tested. This could be a high scoring game. The Ravens won the 1st game 31-30, we could see more of the same.
I think the 49ers will beat the Falcons so a Harbaugh vs. Harbaugh Super Bowl very well could happen.