Actually after doing some homework on my fav company to hate, AN actually uses the highest percentage of chelated nutrients, nutrients are taken in directly instead of being broken down by microbial.
at any rate, uber over-rated and the same results can be seen with GH Flora,
usually the difference in yields are do to experience and have little more to do with chance imo. A side by side grow by an actual grower posting results would be needed, then we could actually know for sure.
My largest yields are with gh flora. But i still use them and can grow a mean bush after all the practive ive had.