Well you're paying for a better panel. 10bit panel vs a 8 bit. The SUHD also has Samsungs version of quantum dot (nano crystals). This technology is used for achieving a larger color spectrum. It is also HDR ready. I've also noticed that the 10 bit panels have lower motion blur. This is calculated by the led response time not refresh rate. It the time it takes an led to change from one color to another.