Anecdotally, I have never noticed a difference with gear. For years, I was convinced that GH was a different matter altogether. After spending several thousand dollars on pharma Genotropin and Serostim GH back in 2021-22, I’m not even convinced that is always a huge difference.
HOWEVER, I also work in pharma and have been in this industry since 2004 and can say that there are ABSOLUTELY differences between branded products and generic equivalents…in the clinical data, the results/feedback from docs and patients, AND under mass spec evaluation.
So, who knows, really?
Hell, at the end of the day, if you don’t have .001% genes, no amount of Serostim, Humalog, Bayer Primo, OrganonDeca/Sustanon, 76.5 mg/mL Parabolan, Pfizer Equipoise, or Winthrop Labs Winstrol is going to make us what we really want to be.

I would think the biggest differences would come down to sterility and what’s on the label actually being in the bottle.
But what do I know? I thought Jack In The Box was a chain of sperm banks…