What type of lighting do you have, and what is your bioload like? From what I've seen, highly populated tanks (but well skimmed and maintained) have deeper, richers colors than SPS in pretty empty tanks. Lighting also has a lot to do with the way the color looks. I have only seen bright pink birdsnests under T5ho, very rarely is the color as nice under halides.
IMO the neon colors you get from using something like ZEOvit just aren't that natural. I mean they're pretty don't get me wrong, but I havn't seen pictures of fluorescent blue Acroporas in natural reefs. You shouldn't need ZEOvit or Prodibio to get nice colors from your SPS, but that's just my opinion.
-Justin