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Both series include a built in Roku operating system, 4K UHD, and HDR Support. The 6-Series builds on this and has additional features such as Dolby Vision, wide color gamut, CCZ technology, a brushed metal cabinet, etc. You can also visit www.tclusa.com/products/home-theater/6-series and scroll down to "Compare All Models" to see all models compared. Hope this helps! Thank you, TCL Customer Support
Sorry, there was a problem. Please try again later.There is a big difference between the 4 and 6 series. The 6 series is the premium version and contains Full Array Local Dimming which means black color will be blacker as the leds that light up can be dimmed.
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