Gemsand Sorry, I can imagine your frustration, I guess I won't be considering the VG27AQA1A then, wanna avoid any possible issues too.
Saw this post https://www.reddit.com/r/monitor/comments/we8t0s/to_everyone_with_eye_strain_solutionwtf/ so I went and dug out some old polarized lenses I had, turns out my old LCD is polarized at 45Āŗ (diagonal) and when I went to the store again, all LCDs were vertically polarized, LF24T350FHRXEN included, only some TVs were horizontal just like what the polarized sunglasses are used for (horizontal sunlight glare), not sure to what extent polarizers have impact but it's useful to know now, either way just looking at the Samsung still felt like the image was more pleasant and natural to me but would have to test this in more prolonged period and not just staring it at the store.
You could be right about backlight, from what I've been gathering, they have been using different phosphors and diode combinations over time to achieve better colors on LCD (nano IPS, Quantum Dot, other phosphors and alternatives), which affects at which intensity blue, green, red are emited in the spectrum (https://pcmonitors.info/articles/the-evolution-of-led-backlights/#Improving_the_phosphors) so who knows, maybe our eyes prefer the older wled backlights.