What bank are you using at home? or what bank is your CC or checking/saving account part of.
I have citibank checking/savings account so I borrow from citibank. that way, I only have to deal w/ one bank and because I'm a long time costumer, they treat me better. =)
the financial aid however I think is supported/sponsered by Bank One. I think.. i'm not sure how Bank one really is...
If there is a difference in interest rate for the loans then I am not sure and you should contact the individual bank you are borrowing from.
So bottom line is, I would borrow from the bbank which I have my major credit card, or banking cards to.