@ Mark Bremmer:

Thanks Mark for your comments and feedbacks. Very valuable, as always.

I agree with you, Unity and Unreal are both top-notch game engines, quite on par with each other. The only reason I went with Unreal is that Unreal gives you their entire package at no charge, while Unity leaves some functionalities out of their free version. Other than that everything we say in this thread about Unreal should apply word for word to Unity as well.