Hard to put a grade on things, especially when some things may excel in one area, but not another. Also I've not heard Ares directly A/B to anything except the 2Qute and Bifrost, or on speakers. When listening to speakers, it is much easier to hear distinct differences between DACs. Differences are much more subtle on headphones.
Soundstage on Gumby was better than Bimby and Mimby. 2Qute was relatively flat. Detail on Gumby was better than MA - this comparison was done via headphones through a Cavalli Glass. It was subtle, but definitely there. But this thread is about the Ares, which I've heard only at meet events - quiet meet events, but not all the DACs were on hand. There's still a slight warmth to the Gumby, despite its soundstage and detail. What I mean, it might not be considered neutral per your requirements. I would press on people who have heard Gumby and Ares, in the same sitting, to ask what they think. Sorry, I've heard these, but too many other variables were in play to make a good review comparison.