Since I liked Revolutionary Girl Utena and Mawaru Penguindrum, I'd like to watch the Yuri Kuma Arashi anime, particularly since it's spawned some interesting questions on this site.
Now, Wikipedia tells me that there is a manga, an anime series, and a light novel, which MyAnimeList give nearly identical summaries for (1, 2, 3). The Wikipedia description suggests that the announcement was first for an anime series, but the manga is ongoing and started first, whereas the anime is already done with. Moreover, the Wikipedia character lists suggests that the manga occasionally differs from anime characterization.
How do the various adaptations of Yurikuma Arashi relate?
Can I just assume that the "original" medium was the anime?
Is the manga simply an adaptation, or is it the "original" work?
The light novel and manga are listed as "alternative versions" on MAL. Are there any major content differences? (Is there anything comparable the differences between the two Fullmetal Alchemist continuities, or maybe even just the differences I've heard of between the various adaptations of the basic content of Revolutionary Girl Utena?)