Yes it is an organic material, There will be cross over in their properties, depending on grain, growth circumstances, how long it has dried for, any curing etc. Age of wood, cellular structure, however actually there will be a ‘sound’ within each species.
The luthier rightly cannot predict what the exact sound will be, but I bet he knows when he combines woods what the ball park will be.
Like I said, despite hearing a difference in the woods no matter which way round one is supposed to be, there was an audible difference, and everything said points to tonal differences between woods be it minor or major, maybe someone will get the P number to 0.05 and get us statistically significant result....