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The 55 and 65 inch s89c used the first generation QD-Oled panel whereas the s90c uses the 2nd generation panel. This far in, the case may be different as they may have run out of first gen panels. The 77 inch s89c on the other hand has the same panel as the s90c as there was no 77 inch panel the first year of QD-Oled
Sorry, there was a problem. Please try again later.JB - The S89C features built-in Dolby Atmos. When comparing both models, the S89C utilizes a 2-legged stand, whereas the S90C has a center stand. Additionally, the S90C includes features like Filmmaker Mode and Tap Mode. ~ Samsung Specialist
Sorry, there was a problem. Please try again later.Not an expert but the S90 is very good. I struggled to get the set up with sonos, players etc working the way Geek Squad installed but most was my learning curve. I would think you will be satisfied with spending the extra amount as long as it is reasonable. Good Luck
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