I am just finishing up one of my applications, and I am wondering which of my letters of recommendation I should submit.

I intend to submit a letter from one professor and then a second letter from either a professor (tier 4 school) or a federal district judge I did an internship for. I expect that the letter from the professor will be slightly stronger, but both should be good. However, the judge graduated with her JD from the school I am applying to.

Does anyone have any thoughts on which letter I should submit (I can't submit both).

In case anyone cares - the specific instructions from the school are: "One academic letter of recommendation is required for the LL.M. program. You may submit only one additional academic or professional letter if you wish to do so."
Thanks.