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I've tested both at home in same afternoon.
The good one has white color more yellowish and colors are not so vivid. Also the black letters are sharper.
This white differences are not seen with naked eyes. I mean that the white looks white on both, but when capturing photos with camera, I see the differences.
With naked eye I can easily see the differences into reds (the good one has a nice red, the bad one is so vivid that I feel it burns my retina. For example, if I look at Google logo for 2-3 seconds and then looking into my room, I can see the logo in room, printed on retina for 3-4 seconds.)
Also, with naked eye I can see a big difference between font clarity. Is so easy to read from the good monitor and so hard to read from the other one. The black is not black, is like a dark grey and characters are foggy on the bad one.
Both tasted on 2 laptops with win 11. I changed the laptops between them, after that I changed the HDMI cables between them, same results. The good one just works with everything, the bad one with nothing 🙂
Even If I tried to calibrate them, I can't. If I calibrate the white, the reds are too vivid. If I calibrate red color, the white is very, very bright.
I returned it 🙂