I purchased the 55-inch LG NANO75, but it is also available in 43-inch, 50-inch, 65-inch, 75-inch, and 86-inch sizes. The performance does vary somewhat between the sizes.
I've heard that the 50-inch model LG NANO75 uses a different panel type, and the 86-inch model supports a more advanced image processor and has some additional features, including FreeSync variable refresh rate support and
HDMI 2.1 bandwidth on both ports.
So, please check with the merchant to see if there is a difference before you buy。