I remember back at BassCamp, Markus showed us two identical corvettes, made in the same factory, with the same equipment, made with the same wood OF THE SAME TREE.
And they sounded different. Very different in A/B situation. ONe was made with the top of the tree, the other with the bottom of the tree. Teh difference in density accounted for all differences.
It's just physics, and resonnant frequencies, either you have an instrument with woods that have an harmonious resonnance or not. Extend that to the premap or the value of some capacitors that are different within tolenrances, and you have magic happening.