Where do I start. First off, I must admit I read this shortly after Rewatching s-CRY-ed anime. If you liked the anime, don't expect anything similar. Do not get me wrong, its fun in a quirky, nonsensical way.
First off, the characters are, while having the same types of motivations, have predominantly different powers, entirely new unheard of characters. It doesnt have the depth that the anime does, (surprising seeings as its usually the opposite.)
Now, I dont know which came first, this manga or this anime but the anime had rules, structure, and a fairly coherent plotline. This series was an under cooked Gurren
Lagann. And I Love Gurren Lagann. And i enjoyed this manga. but i would not bother buying this one, Read it at a con. Or just stick to the anime.