AZukr make sure you have appropriate refresh rate set. If it set to 30 Hz, then yes, microstutters will be noticeable. At 60 Hz it should not be really noticeable. Best way to avoid them altogether is to have refresh rate set to multiple of fps (there is option to set this automatically before playback), but that's not always possible. Note that comparison to legacy RPi2 means nothing to me, whole playback stack has nothing in common with H6.
I am talking about movies with 24 frames per second refresh rate. My TV natively supports this refresh rate, and in Kodi I have set option for
Adjust Display Refresh Rate for video player. For some reason movies have noticeable microstutters