Toolbag I believe is more for simplicity. And can get you decent render in no time. UE4 however will better show your skills to the prospect employers.
Marmoset Toolbag contains excellent functionality for quickly producing renders of 3D props, characters, and small scenes/dioramas. It is my go-to for both prototyping and high quality render output. When it comes to 3D environments, in my experience it is always better to use a game engine like UE4. Toolbag lacks in asset…