Specifically because I am tired, I don't really care all that much, and I don't think it matters mainly due to it's lack of use, I'm not going to.
I will tell you that this has come up before, was discussed, and it was determined that "(FA) <sumti> FA <sumti>" is equivalent to "(FA) <sumti> ju'e <sumti>", and that I'm fairly certain the discussion is in the Google Group archives- although it is possible that the discussion predates the move to GG, I doubt it does. It's also more likely to be in the main group than the beginners.