It's really very difficult to say what is better because unless you're getting pharmacy grade the quality of HGH batches is rarely consistent. All 3 you mentioned are generally decent but some guys will swear by nomatropin and others will say kefei is best etc. HGH is such a fragile peptide so its easy for it to get damaged due to improper storage somewhere between the manufacturing process in China and when you finally get it from your supplier. If your supplier is well established and trustworthy then chances are you'll get a good product whether it's noma/kefei/keifei.
Nomatropin is very pricey but it's probably Nomad's best product. I don't think its worth spending the extra $ though. I don't know anything about eurotropin. Keifei is worth a shot.
