I royally messed up with sending my required documents for Penn’s financial aid, and thus am still waiting on my final offer. 
From both schools calculators, Penn would’ve been around $5K more expensive a year, but I’m not sure what the end result will be. Harvard gave me $25K/year less in aid than the calculator estimated. Should I wait for Penn’s offer before appealing with Harvard FA so I can compare the two to them, or go ahead and appeal first?