I've personally used both. I personally prefer a&b bionic over balling salts. I found my colors and growth of sps to be much Rucker in color and faster growth. Now I've been out of the hobby for a bit. But I sold all my sps colonies to cougarman which I just found out shut down his 600g a while ago. He said to me that the corals he bought from me were some of the healthiest and most colorful corals he had bought at that time. This is just my opinion tho.