Update on the Inter-Conference and Division Standings through Week 15, prior to any Week 16 Games.
AFC 32 wins, NFC 26 wins
AFC teams vs NFC
3-0 Steelers (at Saints)
3-0 Titans (vs Washington)
3-1 Chargers
3-1 Patriots
2-1 Chiefs (at Seattle)
2-1 Texans (at Eagles)
2-1 Colts (vs Giants)
2-2 Bills
2-2 Ravens
2-2 Browns
2-2 Bengals
2-2 Broncos
1-2 Jets (vs Packers)
1-3 Dolphins
1-3 Jaguars
1-3 Raiders
NFC teams vs AFC
4-0 Rams
3-0 Saints (vs Steelers)
2-1 Eagles (vs Texans)
2-1 Packers (at Jets)
2-2 Bears
2-2 Vikings
2-2 Lions
2-2 Panthers
2-2 Niners
1-2 Seahawks (vs Chiefs)
1-2 Redskins (at Titans)
1-2 Giants (at Colts)
1-3 Cowboys
1-3 Buccaneers
0-4 Falcons
0-4 Cardinals
Non-Division Games:
22-16 - AFC West
20-16 - AFC South
20-18 - AFC North
19-19 - NFC North
19-19 - NFC South
17-19 - NFC East
17-21 - NFC West
16-22 - AFC East
Interesting to note that of the two divisions the last place AFC East played this year (AFC South and NFC North), neither ranks first in non-division play. The AFC West ranks first in part due to a decent non-division record from their worst team (see below). This year the AFCW played the NFCW (a mediocre 15-27 once you get past the Rams) and the AFC North.
Teams with the best delta between intra-division and inter-division games, aka 'benefitting from playing in a weak division' logic:
Dolphins: 4-1 in AFCE, 2-6 vs rest of NFL
Cowboys: 4-1 in NFCE, 4-5 vs rest of NFL
Steelers: 3-1-1 in AFCN, 5-4 vs rest of NFL
Eagles: 3-2 in NFCE, 4-5 vs rest of NFL
Conversely, teams that performed best outside their division:
Chargers: 3-2 in AFCW, 8-1 vs rest of NFL
Texans: 3-2 in AFCS, 7-2 vs rest of NFL
Seahawks: 2-3 in NFCW, 6-3 vs rest of NFL
Raiders: 0-4 in AFCW, 3-7 vs rest of NFL