Two completely different actions. Everything you listed is a secretagogue that helps increase your endogenous hgh so it’s still your body making the gh it’s just boosted up. Hgh is actual exogenous growth hormone that the more you use the more gh that you will have in your system. Secretagogues all have a ceiling effect which isn’t really too far past your top natural abilities of producing growth hormone. Personally, I like hgh. It’s really not that expensive and it is far superior to anything you listed. Hope this helps.