I don't buy the two similar basses with different fretboards test because there's too much room for other variables.
If anyone's serious about it, use the same bass with the same electronics with the same strings and swap necks. Then you'll have a fairly accurate idea of what the change in necks MIGHT have done as far as the tone.
Pickups that look alike don't have to be alike, and seemingly identical pickups with the same DCR can be wound and/or potted to sound very different.
I'm not saying that a maple body and a mahogany body are going to sound alike with the same parts, but if you want to know what one part does, that part needs to be introduced into the test by itself with no other changes.
If anyone's serious about it, use the same bass with the same electronics with the same strings and swap necks. Then you'll have a fairly accurate idea of what the change in necks MIGHT have done as far as the tone.
Pickups that look alike don't have to be alike, and seemingly identical pickups with the same DCR can be wound and/or potted to sound very different.
I'm not saying that a maple body and a mahogany body are going to sound alike with the same parts, but if you want to know what one part does, that part needs to be introduced into the test by itself with no other changes.