We used to order the same Gibson acoustic guitar 6-10 units at a time, for whatever reason, the Montana acoustic dealership orders always came through us at Manchester shop.
we’d sit and compare them and even same day of completion, same spec, out of the box guitars sounded different.
Better/Worse is always subjective but some were vibrant and alive, great for strumming, some were dark and woody/dead which was crap for strumming but ace for flat pickers.
Anyhow, that’s my anecdote on production variables.