Joe Nall is BIG. And I mean BIG.
It's a great show and loads of friendly folk, but it's overwhelmingly BIG.
I enjoyed FTFF, SEFF and E-Nall FAR more than Joe Nall (those three are VERY comparable for size and feel). Nall is a great event, but it's far more for spectating than participating.
Your call. Either should be fun, just a different kind of fun.