We had financial aid packages that varied by as much as $20k. When both of my sons were in college, the EFCs for each school were similar but the types of awards varied significantly.
EFC is what the school feels your family can afford based on savings, current income and future resources (i.e., borrowing). It’s NOT what your parents say they can afford. You’ve got some good choices. Surely there are reasons you applied to these schools and you thought you’d enjoy attending? Focus on the positives and make the most of the schools who are willing to pay for you to attend.
DH and I were both 0 EFC students. He went to an Ivy, I turned down a T-15 due to a poor FA package and struggled to pay my way through a flagship. The discrepancy in FA awards has been around for many years.