Homunculus, Gogo Monster Recommendations
Pretty much the same story. Both contain similar themes of escapism, hallucination, and isolation while using surrealistic imagery to immerse the reader. They never explicitly state whether the story is supernatural or psychological in nature, instead exploring both in equal detail. The main difference here is that Gogo Monster is a coming of age story with child characters, whereas Homunculus is a story that focuses on predominately adult characters and consequently, more mature themes.
Exactly the same story. Homunculus is much (MUCH) longer, so it has more time to flesh out its universe and focuses more on more varied themes, where as Gogo Monster is just a quick romp into a completely abstract world, but both are psychological, horror-filled tales about isolation and the way the human condition deals with that, and are highly surrealistic.