I am an AU alum. I graduated a while back just when they were starting the MFA program (I opted to stick with the MA). Can't compare it to Stanford b/c I don't know Stanford's program. AU is a great program if you plan to make social issue documentaries, environmental documentaries, or want to be close to the research facilities of Washington DC. It is very much a practical-focused program (since it is situated in the School of Communications).
For perspectives from more recent AU alums (including ones who have been through the MFA program), you might want to repost(sorry hosts) your specific questions in the Teaching Docs topics since not all the professionals who could answer your question check the public topics.
Congratulations on the acceptances to both institutions.