My Samsung vs LG opinion:
Went through 5 samsung screens, now got an LG screen.
My samsung screens mostly got two problems, backlight bleeding in the corners and yellow bands.
The LG screen that I got now has a more clearer, crispier white, and therefore less yellowing. This is especially nice if you use the computer mostly for writing and reading (word and pdf), a little bit easier on the eyes.
I also think the display is a little bit more sharper. Looking at photo's I seem to get more detail out of it.
Saying this the samsung screen also has important pro's. The screen is a bit more brighter, and also seems to have a native higher contrast, therefore looking more "lively".
Also the black is more uniform on a samsung. Although it is difficult to get one without (or with evenly spread) lightbleed, if you get one it's perfect. Although I think the LG manufacturing process is more consistent, they use a different filter in the panel which always gives a greener look on the left side on the display, and more red on the right side. When u got a good samsung screen, the black is perfect.
Saying all this I think the best screen for me is a samsung, but only with minimal yellowing and backlight bleeding. But it seems it's pretty hard to get one of those.
That's why I decided to settle with my LG screen which has no dead pixels, minimal yellowing and pretty evenly spread backlight bleeding. The green and red tint on black screens is annoying though.
A little bit weird to say this but I got a feeling this whole screen exchange thing took a bad effect on my stress level and mental health. It became somewhat of an obsession to get the perfect screen. I decided to give up and focus on other things in life.
Whoever Apple failed me big time at giving me the product experience I was looking for buying this thing.