I have not formed a solid opinion on tone woods or fretboard wood....I have a mahogany bodied Alembic Essence with an ebony fretboard and an Andreas bass with Ash body and an aluminum fretboard. Both basses run different Alembic pickup/electronic configs.......On paper the Filter driven Essence with Mahogany and ebony should be warmer. The Alembic is a fabulous bass but the Andreas just sounds better. It has greater presence and great versatility. I have yet to play a better sounding bass. Most folks assume the metal fretboard makes for a " metallic" tone. It does not.
I do believe that tonewoods have great impact on how instruments sound acoustically. Once you are sourcing your sound through the pickups via bridge and nut/fingers other factors completely overwhelm any audible impact of the tone wood. There is too much else influencing the tone. The biggest influence of all being technique!