I recently saw a thread in which a poster had two apparently identical guitars, but they sounded different. One (I'll call it guitar A) was brighter. Thinking it was something in the electronics (slightly different pickups, different values, etc.) he swapped out all the electronics between them to see what effect it had. Guitar A was still brighter. The only difference he could identify between the guitars was the thickness of the grain in the wood of the body. Apparently wood makes a difference. But maybe it's the individual pieces of wood, not just what kind of tree the wood came from. I was hoping he had chimed in here, but don't see it.