Purdue or UMD for Aerospace Engineering

So I got into both Purdue and U Maryland for Aerospace. While I got nothing in scholarships from Purdue, I did get $12500 per year for UMD. Purdue has the better program especially in propulsion (which I want to do), but I am kind of scared about the graduation rate (About 51%) for Purdue. Do you guys have any suggestions or information for which university to choose?