Suns are a lot cheaper too.
As for info Vincent already noted that they are non-photosynthetic so they require regular feedings. I usually use Mysis shrimp or TDO pellets. If you want then to survive and just maintain you can feed them once a week. Each head separately. If you want them to grow into a larger colony you'll need to feed two or three times a week. They can be placed in locations other corals can't including on the underside or insides of caves, etc. As long as you can feed. I have always found they do better if the colony is placed vertically on the side of rocks where they get a decent flow bring food to them.