Both should be fine with appropriate lighting. The rics can be spot fed small chunks of meaty food i.e. shrimp,clam, etc. Im not an expert, but the ones we got from swf are happy with light, low/med. flow and we feed bits of shrimp maybe once every 2 weeks.
We dont have any yellow polyps, but we do have button polyps. Ours seems to enjoy good light and med. flow. They will catch bits of food that floats by: mysis, flake, whatever. Again, not sure if yellow polyps are the same, but they sure look similar. Heres a pic: