Gh is Gh, it might not be anabolic if other hormones like somatostatin are present while GH is released but that is about it. There are not "types" of gh as it is a pretty standard 191 amino acid sequence.
Testosterone does build "muscle" or to be more specific lean tissue even if no training is present so "localized igf-1 expression" is not exactly a key factor. IGF-1 might be but localized... no.
Bottom line, spread your gh doses, most doctors have switched to gh secretagogue (GHR-P's) for HRT BUT for bodybuilding purposes, exogenous GH is the name of the game.
Alone, HGH is not that good a muscle builder but it has many benefits on other type of tissues that gear just won't address (soft tissue, ligament, connective tissue, skin cells etc).
I have no studies to back it up but I think most, if not all of the benefits of HGH comes from IGF-1. I just did a small cycle of IGF-1 LR3 and mechano growth factor and the results have been nothing short of amazing on pure sports performance.... I'm able to ground opposite players, train even harder then in my 20's yet still remain injury free, which helps getting my hefty salary paid by my bosses to keep a crowd of drunken spectators entertained.
