Indeed XTOL 1+3 is both sharp and very fine grained. Graininess varies widely depending on development time though. I am using it more and more for contractions with 35mm, rating 100 speed films such as TMX at EI 32-50 and it is the closest thing to grainless I have ever observed, smoother even than super-fine grain developers such as Perceptol, while also being sharp. For low contrast development in any film format, XTOL/TMX is about the closest thing I can think of to the illusive silver bullet - excellent tonality, exceedingly fine grain, high sharpness.