I got the following comment from a reader and I thought it warranted some clarification:
I dont think division tie breaker matters for the Wild Card, it's just for who wins the division. see ESPN's Conference StandingsTherefore there are 3 tiebreakers, and Redskins would beat the Giants on conference record.The Giants do matter in the scenario since only one team from each division can "represent" that division in a WC tiebreaker. Here it is from NFL.com
Three or More Clubs (for Wild Card)
1. Apply division tie breaker to eliminate all but the highest ranked club in each division prior to proceeding to step 2.So, if the Giants and Redskins are both 7-9, New York has the better division record and therefore goes into the tiebreaker pool, where it goes back to head to head, conference record and on down the line.
I hope this clarifies it, feel free to email me at firstname.lastname@example.org with any questions or just leave them in the comments area here.