if you look at the ingredients, similar types of nutes will pull from the same limited pool of options... e.g. soilless/hydro will be similar... the soil fertilizer/organic stuff will pull from a slightly different pool of ingredients, but for the most part, this stuff is not hugely different.
With AN the break up their products into too many bottles. You need a bunch of bottles when 2-3 parts to a fertilizer program is plenty. Breaking it into multiple unnecessary parts is just a way to separate you from your money in the most effective way possible. It's greedy, in other words.
The prices some of these brands charge is price-gouging too. These ingredients, more times than not, are commodities. Meaning they are readily available at the same quality and cheap. e.g. caclium nitrate is calcium nutrate no matter what brand you buy. Some sell it for 70 USD for 25lbs, some sell a 50lb bag for 30-35 USD - or 1/4th the price and the only difference is the name on the packaging... and in this case, whether you can use 50lbs in 10-20 years, lol. good thing about dry nutes is the have a very, very long shelf life.
I'd go with the brand with the better price and fewer products to buy to provide a proper fertiization program.
Fertilizer should be an extremely cheap part of any indoor grow. I spend more on humidifier wicks than i do on fertilzer per year -- 16-20 plants with 5-6 weeks of vege and then 8-10 weeks of flower.. for point of reference. 30-40dollars/year at the most on fertilizer.
4-5 cents per gallon mixed is a fair price. These marijuana brands are 12-15/gallon at the cheap end. That's a whole shit ton of profit margin for a brand name and a pretty cartoon logo that attract children like a sugary cereal box, lol.