Nate Silver likes defense to win championships. According to Mr. Silver, who predicted the presidential election and is a certified stat guy, teams that rank in the top 20 defenses of all time according to Pro Football Reference's "Simple Rating System" (SRS) are 14-6 all time. By comparison SRS top 20 ranked offenses are 10-10. Why does it matter? The 49ers defense will is a top 20 ranked unit. As a side note, the 49ers offense is also rated higher than the Ravens unit.
For some reason, based on nothing more than a hunch, I expect this game to be a blowout. 49ers win big.