While Starfield and the recent Fallout games may originate from the same studio, there are many differences between them. Starfield is Bethesda’s first new IP in over 25 years, and it used the experience acquired from making several games in the Fallout franchise as part of the bedrock of Starfield’s design. There are undoubtedly many similarities due to this shared DNA, which is great because it displays the evolution of Bethesda’s approach to game development. The contrasts between Starfield and Fallout also show the lessons the studio has learned over the years and the new areas it wants to explore in its games.

https://screenrant.com/starfield-differences-fallout-gameplay-story/