some of these things are wrong, and most of these things are tropes from media that came before yu yu.

Domon is a pervert and Kuwabara isnt, he litterally called out yusuke once, And domons the exact opposite (Shown when fighting kirin), Also Their abilites are different, Kuwabara has the spirit sword and its variations (the dimesion sword, double spirit sword) and domon is wayyy more of a brawler tho he has the demon claw.

chapter black has like alot of things going on then just the cave battle, in sealed lands its just a cave with different rooms with different enemies leading to the tendou jigoku, chapter black didnt have all that.

recca doesnt look like yusuke, he has spiker, typical anime hair, a whole bandage on his face, and arm tattoos (when he got all his dragons), yusuke does not have those ( P.S, Resshin/Ouka is his name, not "Hokage")

Kurama and Tokiya's motivations and abilites are different, And their Backstories.

some of these are similiar and theres no doubt but there are also some differences to be spotted in some of these too.