There was an interesting thread on TalkBass a while back where someone fixed a neck and pickups to a plank of scrap timber and compared it to a regular bass, recording the same thing on both and posting the audio clips. After a load of boasty guff about 'tonewoods', more than half of TB members couldn't tell the difference, and I'm willing to bet that more than a few got lucky when they guessed at it. What makes the most difference in tone on an electric solid-body bass are the placement of the pickups, the pickups, the strings and to a lesser extent, the electrics. Bridge material and weight and body material are WAY down the list. IMHO, of course.