macassar ebony best for bright sound - for alternative, rock, Metal, as for me....Macassar ebony is, imho, the best fretboard one can get. Beautiful, stiff, pleasant to the fingers and absolutely dynamic to the ears. If I ordered a PS, it would automaticaly feature that wood for fretboard.
rosewood better for crystal , full of harmonic tones and blues/pop/ska/jazz etc
so i think musician must should choose fb depends of style he playin'