Just go back to the original lab analysis in the lab results section and compare the purity of the top 2 Black Market brands to the pharm grade brand, and you can see a visual representation of the difference between the purity, and theorize why you might see different results. The fillers should also be considered.
With that said, things continually improve, and these brands still do what they should in general, especially with Rips ALWAYS showing high serum and IGF levels.
It would be really cool to get the newest batches retested to see how much the purity has improved. I personally have faith in rips continually improving while being consistently reliable. Have tested them at least a dozen times with every run of bloodwork, and they have always come in the same range for serum and IGF.