Tengen Toppa Gurren Lagann, Mobile Suit Gundam: Iron-Blooded Orphans Recommendations
Protagonist and deuteragonist are mistreated and abused orphans who have a strong bond and consider each other brothers. Simon and Kamina's dependence, unconditional love, and blind-faith on one another mirrors that of Orga and Mikazuki's.
Together, they create an organization and treat the members of their organization as their family. Members of the organization are dedicated and loyal to their organization and what they stand for, and care deeply for one another. If you like the sense of brotherhood in one series, you'll like it in the other.
Both series deals with systematic oppression on people of lower class and their desire to overturn the inequality.
-Both are mecha anime, like duh....
-The relationship shared between Orga and Mikazuki in Iron-Blooded Orphans are quite similar to the relationship shared between Kamina and Simon in Gurren Lagann
-Both anime started out with the protagonist being under control of a higher authority.
-Both anime shared a similar background landscape
-The mecha design in both anime are different
-The art style used in both anime are drastically different and both were made by different animation studios.
-The antagonist in both series have different goals in mind