The thing people who comes from IT does not realize at starting learning UE4 is that it is really easy to use for artists! Seriuosly, it is like a playground for them.
Unity has fast coding iterations, but scares the hell out of artists, from the interface to the reality to have to code something at the very beginning.
I know experience varies from person to person and I know that once you get used to one tool, it is hard to get used to another one (example: 3DS Max to Blender, or Maya to Blender), but all I can tell from my experience (which also came from IT 28+ years) is that either tool will deliver the same, but for results, which we depend on the artists, we need to give them the best tool where they can express their talent, and definitely Unreal is the answer they will want. We focused on coding will have to deal to interface that talent into realizing that art to the world.