Sometimes, it also comes down to what your animal will accept.

Mine will eat the Mazuri, ZuPreem and Marion diets, but absolutely will not touch the Zoo Med. It looks like a great diet, and I wish that he would eat it, but he stubbornly refuses. If I mix it with greens, he will pick out all the greens and leave the pellets. If I offer just the pellets, or mix them with the other foods that he likes, he will ignore the entire food bowl. In fact, none of my other herbivores will eat it either.