For me screen uniformity is the key, and I was lucky to get a perfect LG panel in the second device, after first Samsung (G9P) was yellow tinted and also had uniformity issues. However, while keeping the second one (GH3), I tried my luck again with a third device and got another Samsung (G9N this time), also with uniformity issues from top (pink/reddish) to bottom (yellow/greenish). So I returned that one on spot and kept the LG this time around.
Bottom line: I don't giva a f*** about M14, materials and deuterium as long as the uniformity is garbage, and also I guess I am too old for the screen lottery.