I would like to add to this a caveat that it assumes a windows development platform. I would not recommend UE otherwise. It should also be mentioned that Godot is generally much simpler and easier to get something up and running quickly. If graphic fidelity is important, then godot is quite a ways behind both Unity and UE.

A final note is that you can also fairly easily develop games for godot with C++ using gdnative, though you might be better off using gdscript, even though it means learning a new syntax.