Aren't they all made on the same cnc machine with a computer program?
CNC machines merely rough out blank stock, then either a machine or human sanders go to work.
Wood density varies and the milling process removes or leaves wood in slightly different amounts depending upon factors like wood density, grain pattern, and cutter sharpness.
Manufacturing videos show final body profiling and sanding is by hand and each tech sands a bit more or less than the others.
Looking to buy a US made one, I handled four Gibson SGJ's at GC a few years ago, each had entirely different neck profiles, they varied by being radius flatter versus slightly more rounded etc. The finishes were consistently the same color, patina, stain pattern. I could tell a different person had finished each one though.
I was always unimpressed with the poor sanding at the interior radius of the horns where the end grain showed on the one I eventually bought. Neither perfect nor flawed simply poor (rushed) QC in my opinion.
I've heard Gibby makes about 300 of each model during a daily production run so techs work fast.
That said, my Korean PM20 is a stellar off-shore guitar.
Even as a used instrument there are no finish flaws.