I think Date A Live has some similarities. Both have elements of action and romance, and the characters have unique powers and abilities.
To me, The Testament of Sister New Devil has comparable aspects. It has similar themes of supernatural powers and a harem-like setting, which is somewhat like Infinite Stratos. The character development and story progression also share some common traits.
For me, the novel is better in terms of story - telling. It has more room to develop the plot and characters gradually. The anime often has to cut corners to fit into a set number of episodes.
It has a decent fan following. Some people really love it for its unique storyline and characters.
It's quite interesting. The plot and characters are engaging, and the art style is appealing.
The Infinite Stratos manga on Manga Rock is presented with clear images and easy-to-read text.
The availability of Infinite Stratos manga raw is not consistent. It might be found on some less regulated or niche sites, but accessing such content might not be legal or reliable. Also, it could be region-restricted.
It often features explicit and adult-oriented content with unique storylines and character designs.
It offers a unique blend of fantasy and romance. The characters and their interactions draw people in.
The choice between the Infinite Stratos manga and anime is subjective. If you enjoy detailed illustrations and a slower pace to soak in the story, the manga might be for you. But if you prefer a more immersive audiovisual experience, the anime could be the better option.
One manga that could be similar is 'Great Teacher Onizuka'. It shares some similarities in terms of the dynamic and unique characters and the school setting.