First, the PH/PS-vs-steroid distinction is, in most instances, a ploy used by supplement companies to try and keep the government off their backs. So, don't kid yourself, 4AD and 1-test, along with many others "PHs" and "PSs", are, by definition, steroids, and anabolic-androgenic (AAS) ones at that. These "PHs" and "PSs" just happen to be legal for the time being.
So, if you want to go at this decision as objectively as possible, forget the word games and legal wrinkles. Be honest with yourself about it, and start with "calling a spade a spade": You are considering taking AAS.
Now, think about that. Does that alter your perspective at all? I am not saying it should, but it may in some people. Nevertheless, facts is facts.
Second, you are right in recognizing the specious distinction, in an absolute and objective sense, between *other* supplements and steroids. In the absolute sense, any AAS is a "supplement" (ie "that which makes an addition to" ). As you know, like creatine, taking steroids alone will not give you the physique you desire - there are other things you must do than simply imbibe. The supplement-steroid distinction , like the natural-"unnatural" distinction at this point, only exists in law and rules of governing bodies for certain competitive events. Not that these laws or rules shouldn't be part of your consideration, they should; however, looking at these distinctions from an absolute and objective standpoint may also give a better perspective.
So, to further clarify the matter: You are considering supplementing your bodybuilding lifestyle* with AAS.
Now, your reasons for using or not using AAS is from where your decision should be made. In the end, you need to be happy with who you are, the decisions you make, etc., regardless of what anyone pro or con thinks. A lot of people will say "Yeah, go for it!" and a lot will say "No, you don't need them." Who cares??? You are the one that will have to live with your decision, not anyone else. So, whatever you decide, do it for you and only you.
In terms of practical considerations:
How would a "Yes for AAS" decision affect the way you compete? Is one cycle enough to ban you for life from some events, organizations, etc.? (I don't know much about bbing competitions)