Press compare. then you see, for example, uhd and 4k. As I see it, the more expensive one is even more geared towards gaming. otherwise google 😉

Yes, you asked the same question about the Philips OLED 807, I would buy it. Among other things, it supports Dolby Vision, which the SAMSUNG does not.

Yes, this TV supports HDMI 2.1, but since it is a Samsung TV, Dolby Vision is not supported (no Samsung TV supports Dolby Vision), here are the detailed specifications of the HDMI interface: HDMI 2.1 Features 4K@120 Hz, VRR (Variable Refresh Rate), Dynamic Metadata (HDR10+), ALLM (Auto Game Mode), eARC (on HDMI port 3).

No, it's not worth it, because the LG OLEDs are already extremely good, Samsung TVs can't do Dolby Vision and never will, because Samsung doesn't want to support Dolby Vision (because of the few cents for the licence).

Yes, that's right, Samsung TVs will never be able to support Dolby Vision, because the company doesn't want to pay the costs for the Dolby Vision licence, which is a huge disadvantage, because Disney+, Netflix and later also Paramount all support Dolby Vision. There will never be an update for Samsung TVs, because Samsung is of the opinion that Dolby Vision is not better than their own HDR10+ standard (of course, this is also not true, but Samsung remains adamant, there will never be Dolby Vision support at this company). Other companies take a more relaxed view, e.g. Apple TV and Nvidia Shield as well as Google ChromeCast with Google TV also support HDR10+, as do the AV receiver manufacturers. On principle, I would therefore only buy an OLED from LG, Philips or Sony. They are flexible and can handle more formats.