I would go with the Georgetown interview.
Howard: smaller program, up and down over the recent years, rotate through several hospitals in NW/NE DC; however, location should not be a factor as Georgetown residents rotate out of Washington Hospital Center, which is literally 5 minutes up the road on Irving.
Georgetown: larger program with a great deal of flux (faculty), on probation mostly for inadequate number reporting by an outgoing class, rotates through 4 hospitals to maintain numbers VA/DC/MD; but does always carry a known name which will help with fellowship applications.
Having said that, I've worked with wonderful and capable graduates of both programs. As with many other programs, there are ups and downs, and I'm sure they'll both be fine in the long run.
Good luck!