One thing to remember is that carrying capacity is a weight number. Managing for carrying capacity is completely different than managing for a trophy fishery. You can reach carrying capacity with 2" BG a lot easier than you can with 2# BG.
Also, ponds aren't alike. You can have 2 ponds side by side, dug at the same time, same size/shape and have different growth characteristics in each pond even though you strive to keep them both identical. Why? I honestly don't know.
