Although the ASUS ZenBook UX310 and the ZenBook Flip UX360 use the same IPS panel, the former sports a more refined version with much better multimedia properties – wider sRGB coverage, better contrast, higher brightness, etc.
You can find the available configurations here: http://amzn.to/2vLvKl6
And despite all the differences between both displays, they use PWM only around 100 cd/m2 brightness but you will probably go below 30% luminance if you are working in a pitch-black room. During the day, everything above 30% will be fine, especially for your eyes. We strongly recommend keeping the slider at least above 30% because our equipment detected screen flickering at an extremely low frequency and thus more damaging to your eyes – 200 Hz.
But if this laptop doesn’t suit your needs, we suggest looking into our PWM ranking for a similar or better PWM rating.