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800 series has less technology internally to process pictures. like the X1 Extreme vs the X1 Ultimate processors. It may also have a 60Hz native refresh with the TVs screen vs 120Hz on the 900 series. Go here > https://www.sony.com/electronics/tv/t/televisions < and do comparisons between models to see the differences.
I would recommend:
Sorry, there was a problem. Please try again later.900 series are newer.
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