Anime 23309 Rail Wars Userrecs

Similarities: Both have the same basic plot where it involves high schoolers doing a man's job where it puts the grown ups to shame, it also has the same trigger happy female character and a sweet female character. Romance wise both MC doesn't have any romantic direction at all. However, the setting where different cu'z Rail Wars was set in some alternate place where Japan's Railroad system remains public, while in Amaburi it was set in some theme park where fantasy was the main theme. Also, in Rail Wars, the MC has a harem competing for its affection, while the MC in Amaburi doesn't have a harem to begin with, in fact there is no competition between the two main females character's for the MC's affection.   

Similarities: Both have the same situation where it involves teens doing public safety. Both involves the same plot where the public is in peril. Both have the same harem element, Both also have the same action genre. Dissimilarities: One was set in a school where students need to do a job for grades, while the other anime is a place where teens works to earn their checks. One involves a two people duet to do a job, while the other is a 4 people job.  

This is similar to Rail wars as both anime series are ecchi and and both anime's have similar visuals. Another similarity is that the main characters are students. Also the voice actors who play the roles of Haruka Koumi and Aoi Sakura in rail wars also play supporting characters in high school dxd.