This is the spin-off of binan koukou chikyuu boueibu LOVE!, they are both parody animes of the magical girl genre. You don't have to watch the original to watch this one. Story- it's a parody at the end of the day, doesn't take itself too seriously and is quite funny. I personally really enjoy the backstories boueibu does for the characters as well, I think it gives its story some depth Art- It's fine not amazing but not bad at all Sound- I enjoyed both the OP and ED, both are catchy. It's nice that the characters sing both as well. Character- At first glance, the characters seemto be just different versions of the Love! characters; however, while watching they all come alive and seem to be quite different from their counter parts, in the main cast of the Earth Defense Club. I wouldn't really say any of the Defense club is even like their original series counterparts except for Kyoutarou with En. Though I definitely think Kyoutarou was more fleshed out and therefore different from En. The Student Council though is fairly similar to Love's. There are definitely differences but they could have been more fleshed out.
Relationships- I think the relationships of this series were pretty different from Love's.Who the boys individually are crushing on and the pairings the show gives fodder for are definitely distinguishable from Love's
Enjoyment- Really liked it by the end! Was wary at first being a Love! fan but by the end I came to really appreciate this series' story and it's characters as their own
Overall- Gave it a 10 which would be a 9 but it's votes are so low! Just because there's fanservice doesn't mean it's not enjoyable to non-fujoshis or non-bishie fangirls. (Speaking as a lesbian!)