Well...after seeing the unboxing videos on youtube, it appears that the pipboy edition indeed comes with a steelbook not a metal case.
And the steelbook final design is exactly what was advertised earlier.
I still can't confirm if the standalone steelbook edition will have similar design as the pipboy edition or not. Apparently, all sellers that I have seen are posting a different design for the steelbook standalone version.
Believe it or not. I only pre-ordered the Pipboy edition for the steelbook (I know, I am crazy), but if it turns out that both editions have the same steelbook I will gladly sell my pipboy edition and get the steelbook edition.