Aaron Rodgers plays best when he has a chip on his shoulder. So he should play well here. Rodgers has taken a hit from the press for not having a Rodgers-type statistical season. All the Packers have done, though, is go 14-3. Aaron Jones has emerged as an elite all-purpose back so Rodgers hasn't had to carry all of the load. 
Rodgers has well above average offensive tackles and a very good center to go with a top-five wide receiver, Davonte Adams. That's enough for him to produce points against any defense whehter it's home or road. Rodgers had one of the worst games of his career in the first meeting against the 49ers this season. He won't lack motivation or the brains to make sure a repeat performance doesn't occur. 
Jimmy Garoppolo isn't close to being in Rodgers' class. But he doesn't have to be. The pressure is off Garoppolo because the 49ers should have no trouble running successfully on Green Bay. The Packers have permitted an average of 4.6 yards per rush during their last five games. San Francisco goes three deep at running back and can take advantage of that. The Packers lack experienced cornerbacks to prevent Garoppolo from making short yardage throws in favorable down and distance plays. 
Title games can sometimes get out of control if the losing team is trailing late because all stops need to be pulled out. That could be the case here.