I think you're confusing conference record and divisional record. Divisional would be used to determine the NFC North (as I understand it), conference would be for the seeding in the conference.
https://www.dailynorseman.com/2024/12/15/24322150/minnesota-vikings-control-their-own-destiny-nfc-playoffs-nfl-playoffs
"The second tiebreaker is conference record. In a scenario where the Vikings and the Eagles both finish 15-2, they would each have a 10-2 record against the NFC, as they both swept their five games against AFC opponents. So that’s out.
The third tiebreaker is winning percentage in common games, with a minimum of four games necessary to make this tiebreaker applicable. In this scenario, their records would be the same at 5-1. Here are their common opponents:
Green Bay Packers: Minnesota 2-0, Philadelphia 1-0
New York Giants: Minnesota 1-0, Philadelphia 2-0
Jacksonville Jaguars: Minnesota 1-0, Philadelphia 1-0
Atlanta Falcons: Minnesota 1-0, Philadelphia 0-1
Los Angeles Rams: Minnesota 0-1, Philadelphia 1-0
With that, we move on to the next tiebreaker, which is “strength of victory.” Using the playoff prediction tool from Pro Football Network, in the scenario detailed above where the Vikings and the Eagles both finish 15-2, Minnesota’s “strength of victory” is .443, compared to .421 for the Eagles."