[luci5r]

One of those builds uses the Windows API for HDR and the other uses private API's.  I prefer private API's.  That said, I have zero interest in either of those builds.  I prefer to only use official builds of Kodi mainly because the survival rates of unofficial builds are privately maintained and always fall to the wayside sooner or later.  The official builds are always maintained and improved.  Personally, I only use Kodi as a front end.  Occasionally I use the internal videoplayer but mostly external players.  Those builds are great for users that don't care about madVr, LAV, MPC-BE/HC, PowerDVD, DVDFab Player, etc.

Agreed.

Just my personal experience - I ended up deploying the "HDR Edition" using the private APIs, to use the nVidia API for my RTX 2080 TI card, and after 5 days of usage, I can honestly say i'm a very, very happy camper! The software is continuously merged with master branch which keeps it updated with latest Kodi, and the developers have done a fantastic job! I was able to disassociate all external players (DVDFab, MadVR/MPC, PowerDVD), and am able to use Kodi internal player for everything from 4K HDR to Blu-ray ISO with menus. 

I compared 4K HDR performance against MadVR/MPC and could not notice a single ounce of difference in picture, color or HDR quality. Of course, I'm not a videophile like some others.

Installation and setup was "one-click"; no fiddling with any settings. Refresh Rate changes per content, HDR switches on & off per content, everything works out of the box. 

At this time I'll discontinue the use of external players and continue using the Kodi HDR Edition. If in the future I find development lagging, or disconnecting from official Kodi releases, I may consider coming back to official builds, but for now, this works for me. 

[Links & References Removed]

Thanks!