It looks like the difference is mainly the difference between direct led (or full led) versus edge led. Did you compare the screens in the shop?
Google DIRECT LED VERSUS EDGE LED to read more about the difference.
The price is about the same for each of these TVs and I'm am not extremely knowledgeable about TV tech. If someone could provide me with some advice on which one is better please chime in!
Below is a specs comparison link.
https://www.displayspecifications.com/en/comparison/d8132400b

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