pH down is pH down. They are all derived from the same sources, just with a different brand sticker and price tag.
Botanicare is one of the best nutrient lines that you can buy, hands down. More specifically, their CNS17 line. Why, you ask? Because they have the same thing as every other brand but at fractions of the cost for their Grow and Bloom lines. The reason I use their line is that it is one of the cheapest lines. To put it in perspective, I spend less than $20.00 on a Gal of CNS17 Grow. That gallon lasts a whole year using the StinkBud method.
Bottom line is that most nutrient companies are making money hand over fist on their products because what AN sells for $30.00/Gal, they make for MAYBE $1.00/Gal. A now-banned user by the name of Fatman did an amazing write-up on this. Here is an equally-amazing write-up that includes multiple useful links and a link to Fatman's work.
https://www.rollitup.org/advanced-marijuana-cultivation/368514-hydrobuddy-free-hydroponic-nute-calc.html
I use Botanicare because I, like most people these days, don't have the luxury of time. So I spend my money on the convenience knowing that at least Botanicare puts on Barry White and spits on the stick first....