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The 900 models are Sony’s highest end models. It has a better refresh rate and more pixels.
Sorry, there was a problem. Please try again later.Hi TVQuestionGuy, One of their differences is the back-light dimming type. 900F has a Local Dimming while the 850F has a Frame Dimming type of back-light. You may further compare them here: https://docs.sony.com/release//SPECS/XBR65X900F_mksp.pdf https://docs.sony.com/release//SPECS/XBR65X850F_mksp.pdf Regards, Vincent
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