While I would hope that NPC has made ED pool inclusive, my suspicion will be that its not and has made process more skewed in favor of demographic that don’t need aid especially in need aware colleges. I don’t know if colleges do share the data on “$ aid distributed” during ED round.
My speculation ( I have no data to support) is that colleges use ED to get to the $ tuition figure of where they want to be for a certain in coming class and then assess the aid they are comfortable giving out in RD round.