I've just read that *Filmic* is not completely implemented: https://developer.blender.org/D2659. 


 > Notes:
  
 > - The results appear to be identical to the original Filmic config, but I left out some parts like the renaming of color spaces, BT.1886, grayscale and new roles. Some of those things might be worth adding as well if they are backwards compatible.


>...

**Q:** Are there significant differences between Filmic shipped with Blender and its [repository][1]? *Before going down the rabbit hole:* What does that mean to us and what version is preferred? 

  [1]: https://github.com/sobotka/filmic-blender