Right now Unity has more resources, is much more powerful, and the UI is a lot more polished. Godot's getting better quickly but still has a lot of rough edges.

Right now Unity has more resources, is much more powerful, and the UI is a lot more polished. Godot's getting better quickly but still has a lot of rough edges. However, Godot seems like it's built on a better base and has avoided many, many engine warts that Unity has embraced. Unity's development outlook seems kind of bleak to me and it's lost all community goodwill, while Godot has more attention than ever; in 2-3 years it might be a tougher choice, but for now Unity's probably your shortest path to learning what you want to.