Apples & Oranges - old days the flake was buried in the color ! BC/CC your laying that flake @ multiple directions on top of and in the color depending on the reducer/temp/humidity, that flake can end up drying laying up on top or float down into the color ? ( flop is 1 way we describe it ) then the clear shows it reflecting all the different angles, much enhanced - it can really mess with you, it changes the color very easily, took me years of experience blending into an adjacent panel  -  and sometimes they will have 6 or 7 alternatives in the mixing formulas to help you get close, the optical scanner is not always the answer because the light bounces off the flake @ different directions or the mix has multiple color flake !  Certain colors are more variable,  Silvers & Lt.Blues can test your patience, if the flop is off even a little, you're not dealing with much heavy pigment and it's critical to lay the flake in the same pattern  !  Air pressure and how you thin the paint, the gun ? It isn't as easy as 1 might think -  Back in the day, they didn't have computers painting the cars , 4 cars w/same code could look different, maybe even a batch ran out and started a new drum ? A friend painted cars @ a factory and there were guys full time just on redoing damaged or unacceptable areas that needed re-paint before they got off the property ! Been there late for redo work in my shop , I learned so much from mixing my own paint after awhile and people who helped me years ago / i fell in love with cars as a kid and there's real satisfaction in doing a good paint job, from the ground up it has to be correct - with the price of materials and the time involved, if you have a good body tech - appreciate it  - and that's only the topcoat !  90% of a quality job is preparation  ( I use PPG , did my '65 Coronet in DAU 2K single stage / 2K clear after 1200 wet sand ) NO FLAKE !!!