I think Alex wanted to now were there any differences among the same brand and type. If the instrument was made by hand, definitely yes. I see it especially with the guitar at the wood as the building material. The thickness of the upper board, the exact place where it resonates with the below board, the type of the wood, time needed for the wood to be properly dried and ready for shaping, the humidity in the process and finally the skill in the maker, you simply cannot have two same hand crafted. The more they differ, the more we say that they have character. Instrument with character has a will on it’s own. To be able to embrace that force and to add the touch of your own way, is what makes the sound unique and unforgettable.