User blog comment:Milesprower2/Disappointing Characters/@comment-24491127-20141007015639/@comment-5792287-20141007103133

Alien Flower runs out of ammo faster than any other Sunflower, and Fire Flower is a LOT more powerful overall, while Shadow Flower is more powerful at close-range.

Also, Mystic Flower can only hold its own in a fight thanks to being buffed in the latest update. Before that, it was hated almost as much as Supremo.