I think the 191 is the one you want anyways because our body makes a 191 chain amino acid GH not as 192 thefore your body wont recognize it. I heard the 192 does not conform. In the 90's when it boomed I heard many guys had GH problems with 192. I am not an expert but just stuff I picked up along the way. I am pretty sure the 192 will be rejected and your body will build antibodies and attack itself. That is no good.
I think I have info on this from somatropin....
Somatrem
Somatrem is a synthetic GH protein that contains an additional methionine amino acid, which has been added to the 24-amino acid initiation sequence. Natural (endogenous) humnn growth hormone is a polypeptide containing 191 amino acids. Somatrem has a 192 amino acid sequence. In the human body it works similar as real HGH, but may cause the body to build up anti bodies, thus causing a number of unwanted side effects.
I know slin is dangerous if not done right and I am sure the search function has details but I am willing to bet the GH has something to do with it. I heard jay cutler is hypoglycemic now meaning he needs insulin or blood sugar crashes.