sounds wise its not gona make a huge amount of difference but there WILL be a slight difference all the same in sound, depends on your ears if you pick it up or not i guess. imho the ebony adds a tightness and direct punch to the overall sound but that is just me.
feel wise: you will prob love ebony, a good slice is like playing on something as smooth as glass.
to me jems are all very differnt, as i have said before i have player quite a few of the same guitar (all well setup by the same person) and have only liked one or two of them.
i have a vsbl for a few reasons: it felt right and sounded right (the others i have tryed, bar one, havent felt as good) and i happen to think they look nicer than the vwh