Unreal Engine 4 or Cry engine 3. Why?

I dont understand why people are saying Cryengine has a lack of documentation.
It documents everything perfectly well.

The only difference is, there documentation is there to be read. Not watched on youtube. Watching youtube training videos does not = documentation.
Having used Cryengine for long means i spent a lot of time reading.

Where as in UE4 i hardly read. I watch videos.