https://www.cnet.com/news/the-best-tv-for-the-money-tcls-6-series-now-comes-in-a-75-inch-size-ces-2019/

The 75-inch model also has a true 120Hz refresh rate, while the 55- and 65-inch members of the series are 60Hz. The result should be better motion performance, although as usual the benefits are pretty subtle.

The new 75-inch 6 series' chief competitor is the Vizio P-Series, our previous pick at that size for best picture for the money -- and it also costs about $1,800. Based on my comparison between each series 65-inch sets, I slightly prefer the image quality of the TCL, but both are excellent. And of course the TCL's built-in Roku smart TV system is much better than Vizio's SmartCast setup.