LOL Really? dude, this is how Unreal 3 used to look like:
The interface looked really outdated like Windows 95, and non consistent icons some pixelated some with an artstyle, the content browser interface looked like another application, more like a Game Menu or something… and then when Unreal 4 came out, they completly renew their Interface to look like… let’s guess… hmm Unity’s Interface? LOL
They even have a page on Unreal’s 4 Documentation explaining how similar the UI is to Unity’s… the new Content Browser looks like The Project Panel from Unity.
And that was the company Epic copying Unity’s Interface, this is a Random person, copying Unreal’s Blueprints.