It depends on your projects needs. I built a music visualizer in Unity, and have no idea how I would of done this in Unreal. It was a small project, and I'm already using it to make videos. My biggest issue with Unreal is how hard anything is outside of Blueprints. C++ is much harder than C#, for my project I both load audio files locally ( you select your own music to play), and download some from a server. I'm pretty sure this is impossible without writing code.

If Unreal allowed for Python scripting that would make it much more appealing. I've never worked on a big project in Unity, I'm not sure what issues arise then.

Again, it depends on your needs. I do think most people are better off learning to program with C# over using Blueprints. Ether way your going to need to invest a significant amount of time learning. If you learn C# you'll be able to easily get a job even if it's not in gaming( this is what I did, and it's worked very well for me). I'm not sure what job learning Blueprints will get you.

The visualizer: https://www.youtube.com/watch?v=2dv2cjJIh2s&t=1s