Not trying to be a downer here but trying to set expectations.
Northeastern meets full demonstrated need.
So if you got little to nothing from them, I’m not seeing how it would be largely different from Brown? Yes, all schools look at this differently - but not to the point of one giving little (you said not receiving much aid anywhere) to a ton.
Have you run the Brown NPC? Did you run the Northeastern NPC? Did Northeastern’s office come in similar?
Many people enter the wrong inputs into the NPC - but after CSS and IDOC(it looks like NEU requires and Brown requires upon request) the picture to the school becomes more accurate.
Good luck - just trying to keep your financial aid expectations in check.