Mobile Suit Gundam 00, Kakumeiki Valvrave Recommendations
Both are a fun series with a grup of young people piloting badass Robots, which fights the world. Both have that that "autoparody" feel into it, with Gundam 00 being a little bit more serious in few aspects :)
In both series, there is the usage of mecha featuring action, drama, and comedy. These robots are used for military warfare commanded and controlled by those with experience in order to gain dominance in combat.
Both series' main male protagonist have similar age range and a determination to accomplish their goals.
There is also a distinctive OST in both series. The antagonists are also ruthless and kills without seemingly any remorse that puts the main protagonists at the edge of their lives.
Both are mech series with a small armed faction against multiple large nations, 2 in the case of Valvrave and 3 for Gundam 00. Also both have great visuals and soundtrack, and are animated by the same studio.