No matter plant source amino acid or animal source amino acid, they are both green organic fertilizers or feed additives.
But because of the production process, there will be a bit different.
We have 2 kinds of amino acid,acid-hydrolysis amino acid, and enzyme-hydrolysis amino acid.
Acid-hydrolysis amino acid mainly exists in the form of free amino acid and the average molecular weight is 150. Free amino acid is easy to be absorbed by plants faster.
Enzyme-hydrolysis amino acid mainly exists in the form of small peptides and polypeptides and the average molecular weight is 2000. Enzyme-hydrolysis amino acid is mostly used in feed additive and soil-less cultivation.
No matter free amino acid(smaller molecular) or total amino acid(bigger molecular), they will be both absorbed by plants eventually. You can use them during different periods of plant growth.
Acid-hydrolysis amino acid indicates hydrochloric-acid hydrolyzed amino acid and sulfuric-acid hydrolyzed amino acid. Some plants are very sensitive to chlorine, such as Tobacco, we should choose CL-free amino acids. We suggest sulfuric-acid hydrolyzed amino acid, but it is more expensive than hydrochloric-acid hydrolyzed amino acid though. if you have no requirement about chlorine, there is no difference between hydrochloric-acid hydrolyzed amino acid and sulfuric-acid hydrolyzed amino acid then. You can just choose hydrochloric-acid hydrolyzed amino acid, it is more economical.