I personally don't believe that the sound difference between the two is enough to warrant a choice by itself. If you don't believe me, a/b two basses that are completely identical except for the fingerboard wood. I personally think that maple looks brighter, so psychologically people think it sounds brighter too. Close your eyes and I bet you won't notice a difference. Also, as far as feel goes, maple does feel harder and denser under my fingers, especially a finished maple fingerboard. I think that the finished maple boards are the most attractive of all bass fb's, but to me they feel "sticky" while fretting. Anyone else notice this or I am crazy? An unfinished maple fb feels more like rosewood, but to me an unfinished maple fingerboard is cheap looking and I personally prefer the look of rosewood anyways. Its the shine of the finished maple fingerboard that gets my motor running
Edit: I'm not sure that the fingerboards on the "unfinished maple fingerboards" that I referred to in my post are actually unfinished, or if they have some sort of satin or oil finish. Whatever they are, they are not pretty and shiny like the more common finished boards that I referred to. I would be interested to know if the "unfinished" boards are actually unfinished, and if not, what kind of finish the do have...