While looking up NYC's GA and xGA I noted that DC is very similar on both. DC has played one more game so let's use per game stats:
NYC 0.80 xGA 1.11 GA
DCU 0.83 xGA 1.10 GA (including 3 own goals)
Nearly identical, except that almost all of DC's "excess" GA came in the first 4 games when their keeper was Chris Seitz, who held NYCFC to 1 goal then was pretty terrible, (though he was sabotaged by at least 2 and maybe all 3 OGs that DC has allowed this year). Then they switched to Jon Kempin who was pretty good, and finally they got Bill Hamid back from a calf injury 3 games ago. He has not given up a goal, though that was against Miami twice and Montreal. Still, clean sheets are clean sheets and Hamid is usually solid.
For NYC purposes, though I have not watched DC play since our game Week 1, I think based on their GA stats they continue to defend in a deep block, and look for opportunities to counter. Since our game, they've scored only 7 goals in 9 games. They have opened up somewhat: In the first 5 games they took 11.6 shots per game for 0.85xG. In the last 5 they take 16.6 shots for 1.95 xG. But that has not led to more goals. They've been held scoreless 4 times and have only 1 multi-goal game since they beat us. The reason they are not terrible is they give up relatively few goals.
So, it might very well be hard to break through their defense and keeper. And -- no big insight here -- a lot will depend on who scores first. If DC, it just gets harder, if NYC, maybe things open up.