Senki Zesshou Symphogear: Meteoroid-Falling, Burning, and Disappear, Then..., Vividred Operation Recommendations
Both shows have a joke-level "sci-fi" setting, which looks more like military mahou-shoujo. Both shows are focused on girl's friendship, befriending enemies and some shitty drama. The funny thing is that if Symphogear feels like a third-rate clone of Nanoha, than Vividred Operation feels like a second-rate clone of Symphogear. A profanation of the genre.
Moe lolis in extra revealing batle suit saving the world.
Both series' protagonist are cheerful and upbeat and include girls transforming into battle suits to fight. Symphogear has the added benefit of them having to sing while battling and has less fanservice than Vividred.
Both have sci fi themed mahou shoujo with a darker twist to it. Both seem cute at first but then sh!t happens and we get awesome plot twists and bad ass mahou shoujo fights :3