Both shows have a main character and a variety of girls living under the same roof, but what makes the two even more similar is that they both have a lot of interesting characters. Although there are romantic thoughts in each show, each could easily stand without them. The characters are just fun to watch.
Both are harem genre
Both male protagonist has a roster of supernatural women in their harem the main similarity is both series have a magical girl
Both male protagonist living alone and suddenly their home is invaded by women
male protagonist have supernatural powers though how they obtained it is different
both are set in highschool
Rokujouma no Shinryakusha lacks the dere factor almost every girl is kind to him no abuse
Rokujouma no Shinryakusha has no blood and gore
Rokujouma no Shinryakusha has a balanced harem where each girl has
Rokujouma no Shinryakusha has ghost girl, Kore Wa Zombie Desu Ka has a vampire ninja. read more
Both are harem comedies in which the male lead has multiple girls of different personalities and origins living with him under the same roof (many of them uninvited no less).
Each show does a good job being more light-hearted in its character interactions instead of the typical ecchi comedy that overuses "misunderstandings" and fan-service.
Both shows are also kind of parodies in their own way, as Kore wa Zombie Desu Ka? pokes fun at the magical girl genre and Rokujouma pokes fun at the harem genre in general.
The main characters aren't too much alike, but the girls from both shows mirror each other really well. In particular, Haruna from Zombie and Sanae from Rokujouma are almost perfect copies of each other.  read more
Both have the same scenario where MC decides to live on his own, finds a room only to be surprise that it was occupied by a ghost, except in one is more on the harem side, while the other was more on the adventure.
The same plot where it involves guy encountering something strange and magical, it also involves guy living with a ghost, both have the same mystery and supernatural genre, except in RNnM, has an extra adventure and action genre, while RnS is more on the harem.
Both have main character moving into an apartment with a ghost and then a lot of weirdos show up and from there on there are a lot of adventures. Both also start out really good but then start getting pretty bad after half the show
This anime has a lot of similarities. From setting up a lot of similar character. The first of the main characters who are both bought homes in the boarding houses to live in. until they meet the ghosts dikamarthey live .. and many female characters who appear and stay dikamar main character ..
Both are harem anime with a lot of colourful characters, the premise for both shows are also rather good, but they both get really bad when they go from all hilarious comedy to a more serious plot and only a little comedy here and there
Both have the same situation where Male MC has girls moving in to the same living space as him (Apartment vs dorm) and indirectly creates a harem in the process. Both have plot going in all directions from silly to serious. Both also have the classic set of characters in a typical harem ("deres", childhood friend, etc.).
The two series share the same basic premise: a bunch of different supernatural entities independently converge on the same objective, and are therefore forced to interact with each other and one ordinary guy who's stuck in the middle. But whereas in one show, that objective is the observation of a singular high school girl, in the other it is control of a tiny (barely 100 square foot) apartment.
The main difference is in tone. Rokujouma is far more energetic, with stronger action and comedy elements, but consequently lacks the emotional impact and mystery of Haruhi.
MC also has alot of interaction with 7 specific girls, also in a school setting and it just has a very similar feeling. The MC's are also pretty much the same but I must say Yamada is alot more reckless
-Both are romantic comedies.
-Both have interesting male leads.
-Both involve a girl or several girls end up living with the male lead.
-Female leads in both animes have diverse personalities and characters.
-Takes place in a school.
•Both anime shows have a similar setting. It consists of a multitude of girls living with the male main character (overall there is no real plot, just different things happen each episode).
•There are no "normal" girls as they are from different species (therefore monster girls, more obvious in MonMuse).
•Same genres (harem, romance, etc.).
•Both good anime shows (in my opinion).
•MonMusu heavily focuses on romance while Rokujouma is more of a light romance.
•MonMusu has more fan service.
In both. Enters a character or if are several (in Rokujouma) to invade , mainly the earth, under their own purposes. But at know the owner or owners of the property (base of invasion), forming a strong friendship, making situations comedy.
I am not someone who usually enjoys or favors comedy anime, but these 2 works have seperated themselves from all the anime I have watched as spectacular and funny.
-both are funny
-every episode is interesting
-main characters have competitions among themselves
-nice lighthearted feel
-both have lots of pop culture jokes/ references
-both have likeable main male characters
-1 guy a bunch girls (but not really a harem situation in which all the girls like that guy)
if you ask me for the differences it would be that d.frag is funnier but rokujouma is more interesting and has more than just comedy (characters battling out for the room)
-roukujouma has a better setting
-d-frag has better punch lines
-roukujouma has a bunch of funny character settings
-d-frag has a cast with more colorful personalities read more
Both are supernatural comedies where the quarrel is sorted by games instead of violence. Both feature beings from another world, but while Rokujouma no Shinryakusha is setted in our world, No Game No Life is setted in another world.