Should I Renege After Paying Deposit for Higher Ranked Program?

Hello All,

I applied for two programs during January (round 2 at both schools), was offered a full ride at school A and a smaller scholarship at school B - which happens to be the higher ranked program. I accepted the offer at school A, paid a deposit (around mid March), then gave school B notice that I was declining due to financial reasons (true), and paid the second deposit at school A (early April). Recently, school B reached out to me and offered me a full-ride as well. I am wondering what action - if any - I should take. I wouldn't feel ethical reneging on my original choice after having paid two deposits - especially so late. However, I now have a chance to go to a higher ranked institution for the same price and that is obviously difficult to ignore.

I am not concerned about my deposits but simply wondering whether it would be wrong to drop out at this point, whether the rankings matter enough to warrant the switch (one program just outside the top 25, the other just outside the top 50 - both within the region I am planning to live/work afterwards), and any advice from those who have been in similar situations.

Thank you,