Yes, in my opinion and experience, you will get better growth and color with feeding.
SPS like zooplankton. Freeze dried zooplankton (Reef Chili, Coral Frenzy) are particulary convenient and I also like the Reef Nutrition RotiFeast product ("fresh" / not dried zooplankton). Reef Nutrion's Oyster Feast is also another "fresh" sps food which really gets polyps excited with its "burst cell" (ground up oyster ovaries) attribute.