Is spirit world from Yu Yu Hakusho and and other world from Dragon Ball/Z/Super, one and the same?They both have King Yama in it and...?

It's the same in a way, but different in a way.

In "Yu-Yu-hakusho" it was named Sprit world, but in either case it is the afterlife. 

It's the underworld.In Japan, the concept of a religious afterlife is rooted.

Creators of manga and anime arrange the world after death according to the setting of the work and deal with it in their own work. 

So "Sprit world" in "Yu-yu-Hakusho" and "The Other World" in "Dragon Ball Series" come from the same concept, but are slightly different worlds. 

(Note: However, even people who accept manga settings do not necessarily agree with their religious beliefs. Manga settings are Manga settings.)

This answer focuses on the afterlife of the Japanese.

The basic concept is based on Hindu and Buddhist hell. 

The concept of hell in these religions was brought to Japan along with religion and took root in Japan.

The King Yama, "Enma Daio" in Japanese you mentioned is the supreme judge of the underworld in these religions. 

The horned creatures are the Japanese familiar as guards of hell.

For reference:https://www.google.com/search?q=%E5%9C%B0%E7%8D%84...

(Image is Google image search result. Some include inspiring images of tortured dead. Please be careful.)   

The Japanese are very familiar with the concept that after people die, their souls leaves their body, crosses the river across which the dead cross to the underworld and is judged by Enma Daio for his or her crimes in life. 

That's why this world often appears in creative worlds like manga and anime.

Creators sometimes mixes it conveniently with Western concepts of hell/heaven.

In "The Other World," Gokuu had a round, lightbulb-like ring on his head, didn't he?That is a motif representing an angel in Christianity in Japanese comics. 

In this description, the author expressed that Gokuu was not alive.

By the way, the reason why the world after death is called "the other world" in Dragon Ball is because the concept that the real world is "this side of the river" and the world after death is "the other side of the river" is rooted religiously in Japan.

Therefore, almost all Japanese understand the concept that "the other world" is the world after death. 

And in "Dragon Ball," "the other world" is clearly thought of as a world of souls only.

"Sprit world" in "Yu-yu-hakusho" seems to be a concept similar to the parallel universe.  

The difference from the real world is the dimension wall.

So these are different worlds born of the same concept.

My English must have been difficult to decipher.  

I sincerely appreciate it if you could read through to the end.

If you have any other questions and have the courage to ask me, please feel free to add them.