Working on this one for about an hour now. I think I need help answering yours. Others should feel free to help out on this one.
But I'll go through my usual algorithm. DEN and WAS are both path of least resistance to passing and face Brees and Roethlisberger which are 1st and 6th on passing offensive power. Pretty much a wash there. Both NO and PIT don't have much of a supporting rushing cast and DEN and WAS are both okay against the rush anyway so that's also a wash.
NO has given up more picks (7 in 6 games) with 12 sacks while PIT has only given up 3 picks and 13 sacks. Tipping slightly to DEN there.
DEN has 6 picks and 18 sacks; WAS has 10 picks (in 7 games) and 13 sacks. From a value standpoint, that tips to WAS slightly.
Points against. NO is 3rd with 29 points per game; pit is 16th with 23 ppg; WAS allows 29 ppg (28th in the league) and DEN allows 23 ppg (17t in the league). Pretty much a wash from the stats although tips slightly to DEN as a tougher defense. (This is getting tough!)
DEN plays at home on primetime 8:20 while WAS plays at PIT at 1PM, both are outdoor games. PIT weather shows rain and 50s, DEN weather shows partly cloudy with temps in the 50s. Rain helps a defense. Home helps a defense. WAS gets the rain but DEN gets the homefield.
DEN ranks higher than WAS on sacks/to metric and DEN ranks higher on ProFootball, KFFL (by one rank) and FFToolbox while WAS ranks higher on nfl.com.
I guess the gut check on that didn't sit right with me though so I can't seem to make a call here and think I shouldn't. Basically, I've given you all the facts I can and don't see a clear winner. You may be better off flipping a coin, and if the result doesn't 'feel right', going with the other one. But don't beat yourself up on this one, I can't think of a way of differentiating those two meaningfully. However, there's usually someone out there willing to make a definitive pick for you

. Neither look especially hopeful this week to perform well as a defense. Is there anything on the ww?
Thanks for ruining the last hour of my life (just kidding).
Good luck!