Total Recommendations: 14
Similar visuals: abundant usage of 3d graphics. Similar setting: technological utopia and third world outside of it. Similar heroine: high-ranking government official.
Both anime depict life after death, communities of the undead and some kind of a revolt against the God. The main characters are also similar in a way: they help the undead people to actually "die" and cease their afterlife existance. There are also dramas, high schoolers fighting against the system, lots of fanservice and comedyshit in both anime.
I've just seen the previous recommendation and while I'm completely disagree with the previous person's opinion about similarities between Zetsuen no Tempest and Monogatari Series, I've remembered that I know one similarity between these two titles myself. Fuwa Aika and Senjougahara Hitagi are very much alike. They are both clever, both were the ones who actually made the first step in romantic relationships and both like to tease their respective romantic partner in a good-natured and intellectual way. I ought to say that out of all the anime I've watched, there was only one character who strongly resembles Senjougahara in terms of personality and that is Aika (and visa versa).
Both anime revolve around two gangs of magic users, who are fighting each other. Both anime have a bit of shounen-ai. Both anime have a single letter in their names.
Both shows have a joke-level "sci-fi" setting, which looks more like military mahou-shoujo. Both shows are focused on girl's friendship, befriending enemies and some shitty drama. The funny thing is that if Symphogear feels like a third-rate clone of Nanoha, than Vividred Operation feels like a second-rate clone of Symphogear. A profanation of the genre.
Children with psychokinesis powers play a major role in both shows and the danger those powers pose to the society is a common theme between these shows.
These manga are extremely similar in setting: they show us the world of fictional martial arts, which exist secretly inside the usual present time world. Martial arts in both manga are based on the usage of Ki energy. Another close similarity is that both mangas start with protagonist meeting incredibly strong martial art master and becoming his disciple.
There are demons and organizations who hunt them in both anime. Both anime also revolve around extremely powerful demon, who helps humans to fight his own kind. Another similarity is that protagonists in both anime have to spend their partner's lifespan in order to manifest some kind of power.
Main female characters in both anime are supernatural beings and male characters have mysteries in their past. Similar dramatic plot lines with good romance and minor, but decent action. Also, both anime have wonderful soundtracks.
Both anime depicts romantic relationship with a seriously ill person, who can literally die at any moment.
The relationship between main characters and its development are quite similar, as well as overall mood and atmosphere. So, if you like one of this anime mainly for its drama part and mood (and not the setting, because they are absolutely different), there is a high chance, that you will also like the other one.
These anime share hospital setting as well as some plot devices. Also, they both are realistic dramas, nevertheless their themes are quite different.
Both anime develop "love & distance" theme with metaphoric approach to the "distance" part. Similar atmosphere, similar feelings. Both anime are very touching. Visual styles are also quite similar: incredibly beautiful, with bright colours and massive usage of nontrivial artistic techniques. And both anime share wonderful soundtracks, written by Atsushi Shirakawa aka Tenmon.
The setting and the atmosphere are quite similar. Both anime are really touching and leave strong feeling of melancholy in the end. Also, they both have great soundtracks, that perfectly matches their mood.