The Green will do nothing for growth its more like makeup. The Purple is in the grow spectrum and will give you more PAR and depending on the LED may give you better colour pop.
The Green/Cyan is well within usable light spectra for Coral and excites a broader range of fluorescing pigments the have. Chart/graph below from one of Bill's posts to a similar subject in an earlier thread showing this. The Red may not help with most Coral in photosynthesis but surely makes for nicer coloring in Yellows and Pinks of both Coral and Fish. Personally would never run a LED fixture without Violet, Red and Green/Cyan emitters. Side by side comparisons heavily favor the Broad Spectrum Fixtures over Blue / White only fixtures.