If you're looking for anime similar to Love Live! School Idol Project, you might like these titles. All recommendations are made by Anime-Planet users like you!
Ichigo Hoshimiya is an average first-year middle school student, but after her best friend Aoi encourages her to enter Starlight Academy, a famous idol-training school, Ichigo's whole life changes. She meets various rivals, becomes proficient in abilities that are integral to idols, and uses Aikatsu! cards while challenging herself with an array of auditions.
Well they are both about teenage girls who want to become a top idol of some sort. They are also quite similar on genres, they are both based in a school and include some comedy.
Even though Aikatsu is a bit more futuristic in a way there are many things similar in both of these animes. So that is why I think if you liked one you would like the other.
Both anime feature idols who just about come from nowhere, who work hard to get popular. They both feature a group of girls who look up to a more famous group and they both aim for a certain concert as such. Love Live was more based around the school that the girls go to and how they develop throughout their school live whereas the Wake Up, Girls! Movie is about the agency developing. However even if this is the case the basic story is very similar. And I believe if you liked one you should like the other.