I am going to agree that for potency and a well-done WTA, Aroma just can't be beat, but that is reflected in the cost. I think it can be very hard to "truly" compare them unless you have bottles from each maker, and even then, well, vaping them one after another after another.... I do wish there were some standardization for "amount" of WTA "in" a bottle, just like nicotine, as surely most makers do actually measure that, if lower nicotine levels genuinely mean less whole alkaloids. If they DO measure outcomes (and surely they do) I would be more inclined to pay more if I genuinely knew what I was actually purchasing. E.g. if aroma juice legitimately has say, double the amount of alkaloids than some of the other makers, that would justify cost, to me.
With that said, given I'd imagine the extraction processes are many and varied, you still have the issue of "what" alkaloids and "which ones" are the strongest from whatever extraction process, honestly.
As it is, we are kind of left flailing while adding juice to our tanks at varying rates and amounts. I really have NO idea who is most potent per dollar and would buy accordingly, but at the moment I just don't. I DO know that Mother's Milk is not for me.... I do know that Umbavapes does SOMETHING good for me and definitely the husband, at a lower cost, but I don't know if it's COMPERABLE across the board because when I was using Aroma, I was in the throes of quitting, it's probably not a fair comparison/memory....
Anna