I agree with Chris, mostly.
I find Foma/Edu Ultra 100 coarser than FP4+/Delta but finer than TriX in all developers; I'd say it is smack in between. In Xtol; however, even 1+2 the grain vanishes. In this regard it is just like APX100, which performs the same magic trick of making the grain disappear in Xtol. Its incredible the difference (Foma 200 is the same) and does not seem to make sense, but the eyes do not deceive.
If you are not enlarging too far, Edu Ultra 100 in Rodinal is beautiful.
My personal value choice would be Legacy 400 (Its Neopan 400) which has grain close to FP4+ and produces beautiful images.