If the Giants haven’t quite figured out what their identity is, they should look no further than Sunday’s opponent, the Lions, who are their mirror image.

Both teams are 9-4. The Giants have won seven of their past eight games, while the Lions have won eight of their past nine. The Lions have the 14th-rated defense in the league. The Giants have the 15th.

Neither team can run the ball, so forget the ground-and-pound stuff. The Lions are 29th in the league in rushing at 83.7 yards per game, while the Giants are 31st, averaging 78.7. There’s no reason to think those numbers are going to get any better.

Instead, the Lions and Giants rely on a passing game in which multiple receivers are utilized on mostly short-yardage patterns with a few big plays mixed in. And both have built their records by playing winning football in the fourth quarter.

Lions quarterback Mathew Stafford, enjoying his best season as a pro, has authored eight fourth-quarter comebacks this year, the most of any quarterback since 1950. Detroit has overcome a fourth-quarter deficit four times in its current five-game win streak. The Giants, meanwhile, have compiled their record with an average victory margin of just 4.9.

In a nutshell, what we figure to see Sunday is two teams that will rely on the pass to the move the football, but probably aren’t worth watching until the fourth quarter.

“Our confidence is [where] the game is ours until it says zero on the clock,” Lions receiver Golden Tate said. “That’s how we prepare.”

The Giants keep thinking their offense will get better than it has been. With a healthy Victor Cruz and rookie Sterling Shepard joining Odell Beckham Jr., the Giants were supposed to be darn near unstoppable. But that hasn’t happened. Eli Manning has thrown 23 touchdown passes, but has turned it over 17 times. He has enjoyed plenty of big moments with Beckham, but overall, the Giants haven’t come close to being the offensive machine they envisioned and probably won’t ever be.

“We’ve just got to keep finding ways to win,” Manning said earlier this week. “Our defense is playing outstanding, but we’ve got to help them out. We got to score more points, give them a lead and don’t make it hard on them.”

The Giants and Lions have made a habit of making it hard on everybody this year with most of the outcomes being positive.

“We have guys that don’t wilt in tough situations, particularly down the stretch when oftentimes the nerves get the best of them,” Lions coach Jim Caldwell said. “Sometimes our guys have not shown that to be the case. The old adage is that you don’t rise to the occasion in those situations, but you sink to the level of your preparation. We try to work hard at those things and we have been fortunate to win a few.”

Stafford will play with a dislocated middle finger on his throwing hand, suffered in the first quarter last week against the Bears. He played the final three quarters with a glove on his throwing hand and threw two interceptions in the fourth.

With Stafford injured, the Giants could be catching the Lions when they’re vulnerable. If this keeps up, it won’t be long before it starts to feel like 2007 or 2011, when everything seemed to fall right for the Giants, who went from the wild card to a couple of unexpected Super Bowls.

“We still need this victory to keep ourselves where we want to be in terms of the playoffs and moving forward,” Cruz said. “The Lions are a good team. We have to be ready for them.”

Mirror, mirror on the wall …