for those wanting a scripting language in unreal you have this:
https://www.unrealengine.com/marketplace/unrealjs
However I think skookum script + blueprints is a very good combo if you want to be productive as possible.
Also you’re comparing learning unreal engine + making prototype vs prototyping in unity. if you take away the learning in unreal then it would be a lot quicker. for some games I think it’s quicker in UE4…
Also there are many tools in Unreal than unity. Unity is simple to learn because there isn’t much to learn. you have to make the tools or purchase them… don’t get me started on unity plugins…