I have the C4 in the bedroom and the LG QNED 826 in the living room. In HD channels, I notice that the QNED has better clarity; wrinkles, hair, everything looks perfect, while on the OLED I notice a blurriness on faces. Also, the QNED seems to have higher brightness, at least in practice (I am referring to HD channels); I have set the QNED to 80 while the OLED is at 90+. Then in gaming on the PS5, I can say that I am satisfied with the C4 after making some adjustments, but it doesn’t justify its price. With such a processor and especially OLED, I expected the result to be something extraordinary, and to my eye, I prefer a simple QNED edge LED (I haven’t tried the QNED in gaming to judge). This one is either super overrated or it’s super and I’m doing something wrong, one of the two.

I compare it to a lower-priced Samsung QLED that I own.
First of all, I have adjusted the picture on both TVs so that the colors are as natural and comfortable as possible, meaning people do not look like Native Americans and red does not glow.
Thus, the picture of the LG OLED is better than the SAMSUNG QLED, although the LG does not justify its high price.
The sound of both is typical for a TV, except that the LG has a subwoofer, which personally bothers me because it emits a loose bass and creates a gap in the spectrum, meaning I feel that the mid-lows are missing. Also, I did not find an option in the settings to cancel the subwoofer!
As for the operating system and the remote control, I vote for Samsung.

I have had it for only a few days, a serious upgrade from a Sony 43-inch LCD. Huge difference in the picture on PlayStation. You don't get this TV if you don't have a good source... (of course, not for terrestrial Digea)

After quite a bit of searching, I think this is the best value-for-money 65-inch OLED at 1500 that was purchased. For the quality of the image, there's no need to say anything; it simply drops jaws

Everything is perfect. With A.I, you can customize it to your liking. It's like day and night compared to regular LEDs. You just need to get used to the realism in the new image (especially with FHD torrents, Netflix works great with A.I). Amazing black and very good sound. Flawless construction.