I have done shootouts with Nagra, MSB select II, vivaldi, esoteric and the 40k Aries cerat.
I have not done compares of Atlantic to lower priced dacs but there are many.
My second digital choice is Neodio origine which is mainly a CD player, though it has an USB input. We compared it to trinity, 75k stahltek transport, etc. It sells factory direct for 15k Euro plus vat
My point still.. You can get another dac, say aqua formula, and you can place it next to GA. Maybe in your system it will sound better, maybe it won't. You can't do anything about the one sounding less. I have had shootouts with GG with other dacs where with one valve it sounded less so I simply switched, 2 mins, to make it sound much better.
This is exactly what analogphiles do all day long. They change arm, cart, etc to get their stuff to Sound good. Digital people miss a trick here. I visit fellow Lampi audiophiles and some haven't heard their GG properly yet. Nothing changes in dacs except the addition of externalities such as cables and isolation. With GG you can change am important integral part of the dac.
As an analog analogy, the Allnic 3000 phono lost out easily to half priced Zesto. I posted that on another forum and Myles Astor suggested I swap rectifiers. A few months later I did so at a friend's and we both were stunned by the improvement. So I went back to the first place of trial a year later and forget the zesto, the Allnic also took out the Trulife phono that was almost twice it's price. The dealer was stunned. He hadn't realized how powerful a 300 quid recti could be