When looking at the backs of the DG bottles, I'd almost assume it was formulated with hydro in mind as it supplies all 16 essential elements. If you're growing in soil, sometimes you're fine using a fertilizer that only supplies 7 or 8 different minerals as your soil is sometimes providing what your fertilizer is not. For me and others who are using it properly, DG performs incredibly well in hydro assuming your tap water isn't total garbage (above say 250ppm). When it comes to yields and DG, my limiting factor is my lighting, not the medium. So if you have the proper environment and good lighting, DG is great in dirt or hydro ( I originally tested it in hydro, then dirt. Based on it's performance in both mediums, it replaced both of my previous nutrient brands).
In regards to the thread topic, if AN's remarketed three part performs just like GH's 3 part, then that is a good nutrient to use and I'd recommend it over AN's sensi and Connoisseur lines. BUT, I not only ran a side-by-side test in my journal between DG and GH, but also continued side-by-side tests in order to use up the 5 gallons of GH base nutes that I still have sitting around. DG always out-yielded the 3-part formula and was easier to manage. So much so that the 3-part is now only used in my veggie garden outside.