I am in the process of converting my project from Unity to UE4 and I have made a very basic video oriented toward the people who are facing the same situation to show** how easy** it is to **import assets from Unity to UE4. **In this video I also show the **process of creating a basic Unity PBR compatible material **that can be re-used for any other conversion.
The video is here: Conversion Unity to UE4 and creation of an Unity PBR compatible Material - YouTube, there is also a project in the description of the video with the assets used and the materials for the newbies who are starting and never used the material editor.
I hope it will help the ones who are afraid of moving from one engine to another, it is easier than you think.