Hi there, I have a similar situation a full scholarship at one school and not sure what the aid will be yet at another. I did, however, try to leverage the fact that I got a full scholarship. The response was: " Congrats! Good for you!". But the next day, I received 5 phone calls from the members of the alumni network, trying to pursuade me to enroll.
In the end of the day, I would say, marginal difference in financial aid is insignificant long-term. So go with the best school you got into... Hope this helps.