Statistical Matchups
3rd. Down Conversions
Packers offense: 37%, (trending up to 44% over the last 3 weeeks despite)
49er defense: 30%, (trending weaker to 36% over the last 3 weeks)
49er's offense: 47%, 4th. ranked (on trend at 51% over the last 3)
Packer's defense: 41%, 19th. ranked (on trend over the last 3 weeks to 47%)
Both performance to date and recent trends indicate SF will do a better job controlling the ball and metriculating field before taking turnovers into account.
4th. Down Conversions
Packer offense: 0-3 (the only team to not convert a 4th. down this season while making the fewest attempts)
49er defense: 2-13
49er offense: 4-8
Packer defense: 4-8
It's difficult to reckon whether a game will turn on these plays given their infrequecy (Packers one per game, 49ers two per game) and without situational breakdowns (like opponent desperation tries), a failure to execute amounts to a turnover. Such failure is a forfeiture of punting field position or foregoing the opportunity for a FG. The averages indicate 1.5 such plays with SF having demonstrable superiority. I would equate that to the equivalent of somewhere around a half to a full turnover differential per game advantage to SF.
Chunk Plays
I'm adding this only because of a note this week from PFF courtesy of their free emai sign-up. PFF stated that Rodgers is their top rated QB on throws of 10 or more air yards. Since I don't watch ever frickin' QB in every game I'll take that at face value for the sake of argument.
Previously, I did a breakdown of Packer 3rd. down performace by distance in the thread entitled conveniently "Third Down Performance". Packer 3rd. down performance from 11+ yards is dismal...10%. From 1-3 yards it is also poor at 48%. When you get to 4-6 yards (61%) and 7-10 yards (40%) the numbers are outstanding which include 3rd. down no-play penalties to boot.
This picture presents an odd conclusion: Rodgers has been superior throwing for chunks on 1st. and 2nd. down and/or those mid-rage 3rd. down throws with 4-10 yards to go.
I don't know how to quantify this into one particular match-up. But it does seem to go some ways in explaining how this Packer team has managed to get to the red zone despite being so late so often getting out of the huddle.
Tunovers
Packers giveaways: 7
49er. takeways: 22
49er. giveaways: 17
Packer takeaways: 16
These numbers along with the Packers net +4 advantage on the season gives the Packers about a 1/2 turnover advantage. That's more or less wiped out by the SF edge on 4th. down.
Garoppolo's been pretty loose with the ball, 10 INTs and 7 fumbles (how many of which were turnovers on the bounce of the ball I don't know). Then again, he had 4 INTs against AZ and still managed a win. So you've got an intangible winning factor, Garoppolo now 17-3 for his career as a starter, including finishing 5-0 with that 1-10 49er team in 2017, another example of an injured dog with a bite, the kind to watch out for going forward.
Red Zone TD Scoring
Packers offense: 69% on 35 trips
49er defense: 41% on 22 trips
49er offense: 50% on 40 trips
Packer defense: 49% on 33 trips
On a % basis the Packers get the edge. The 8-2 record is built on red zone performance on both sides of the ball. This is indicated by the Packers scoring only 4.5 points per game more than opponents on average. (As an aside, the fact that Seattle and New Orleans point differentials are narrower illustrates the lack of dominanance among these 8-2 teams.)
However, 49er dominance on 3rd. down is evidenced in the number of trips to the red zone; the get there more often and only New England has kept the opponent out of close scoring range more often.
I believe the 49er defense preventing such trips gives them the edge. It should be noted, however, that Garoppolo has turned the ball over in the red zone five times this season. The Packers might need one of those to flip the script.
20+ Yard TDs
Long range TD scoring in a particular game upends any red zone superiority.
The Packers offense has had 6 such plays.
The 49ers defense has allowed 6 such plays.
The 49er offense has had 11 such plays.
Packer opponents have allowed 7 such plays.
The 49ers offense gets an edge here. Not a big edge, but it is about one extra long TD every two games.
Conclusion
The betting public says 49ers -3 to -3.5, depending on which book you look at. The 49ers are accorded anywhere from zero to a 1/2 point advantage above the 3 points for home field. Anything can happen on any given Sunday (and in this case I hope it does), but the statistical balance of power goes to the 49ers for the win and covering the spread.
Perhaps that's because of this from Nick Wagoner at ESPN:
https://www.espn.com/nfl/team/_/name/sf/san-francisco-49ers
"49ers are going to have a lot of key players coming down to the wire this week when it comes to playing against Green Bay on Sunday night. TE George Kittle (knee, ankle), WR Deebo Samuel (shoulder), K Robbie Gould (quad), WR Emmanuel Sanders (ribs), DE Dee Ford (hamstring), RB Matt Breida (ankle) and OT Joe Staley (finger) are all not expected to practice today, according to coach Kyle Shanahan."
I'm going to go out on a limb and say that because of the import of this game most of those guys will be playing. Let's hope Garoppolo gets loose with the ball; that's the best possible scenario to pull an upset.