Wizard Barristers: Benmashi Cecil

An organization formed, created for the purpose of hunting down dangerous individuals. The main characters belong to this organization as their daily tasks put their very lives in danger. Wizard Barrister has more comedy while Witch Hunter Robin maintains a gloomy mood. Nonetheless, they fulfill their premise. There's also hidden secrets and dark revelations that changes our characters' lives forever.  

Both are setted in a world where people who can use esper powers/magic exist. Those people are considered evil/being discriminated against by most of normal people. Group of people with those powers are fighting another people with those power that are harmful to society. 

Character-wise, Wizard Barristers and Mondaiji-tachi have characters so perfect as to be annoying. Wizard Barristers have the mary-sue character Cecil, and Mondaiji-tachi has Izayoi as the gary-stu (female version of mary-sue) character. Anime fans who like perfect characters as perfect as perfection itself, cliche relationship towards other characters and also upstages every other characters, possesses unbelievable unimaginable powers to defeat enemies easily for the convenience of the plot, lacks any realistic or story-relevant character flaws, if you like these kinda, then definitely try Wizard Barristers and Mondaiji-tachi. 

They Both CG , The most characters are girls , in wizard Barristers the girls are a group of Barristers , in arpeggio the girls are battleships and the main character in each anime want to proof something .  

Similarity is that people with magic and people without magic, the story is not similar. In Mahouka people without magic are discriminated against and abused by those with magic, but as for wizard those with magic are feared and discriminated against. Those with magic get's special treatments while in wizard those with magic tend to be judged with prejudice. If you like the type of anime with 2 different people "Those with magic" "Those without magic" you'll like these both. 

Mystery and supernatural powers. Shinrei Tantei Yakumo and Wizard Barristers: Benmashi Cecil shares a little of both elements involving the main characters and their stories. Despite not having similar settings, they convey a mysterious atmosphere in relations to their stories. In particular, the main character gets involved with cases that not only puts their lives at risk but also reveals more about themselves with others.  

Mezzo and Wizard Barristers has the same character design. The main characters from both series work for an organization. They must stop criminals and uncovering the hidden truth within their city. Both series has a strong main female protagonist who does her job right. One series involves guns and close combat fights. While the other is also similar but they use magic too. There is an evil organization who has an interest in our main female protagonist. 

They have somewhat the same feeling, however Junketsu no Maria has a deeper storyline and it is more interesting.