All machines are brand dependant. Nippon got Nippon machine, Jotun got Jotun machine etc. Authorized dealers will use their respective brand machine. No "cheap" machine unless they're scam shop 😂😂😂

Usually paints don't keep ready stock in store unless is basic colors in some bigger chain hardware store, and even then only small amounts for small DIY projects (not enough for full house).

As far as whether what you see is what you get, must consider both the finish and also the LRV of the paint. What you see on screen/in shop might not be true when put in your house, because of different lighting condition.

Best bet is to ask for samples, if you're DIYing

https://thelandofcolor.com/lrv-light-reflec...f-paint-colors/