These days when I compare DACs, I use ROON and the GROUP stream feature. I stream using 2 identical Sonore OpticalRendu's connected the same way to 2 DACs.
If you use an ultra-revealing and neutral preamp like the Benchmark LA4 into a pair of XLR or RCA preamp inputs, then the test is almost like a lab test. I can switch inputs on the preamp to hear the identical sequence of music on either one of the DACs.
Another totality different way that I have used for DAC evaluation has been to solicit the opinion of musicians, especially if they have some personal connection to the recording. The person I am lending my 005 to is also a musician and has worked with a lot of musicians and knows how they should sound. So, assuming a recording is good, I have been able to get feedback on a few of my components and how close they are to producing an accurate sound. I sold a few pieces and rearranged my office based on the feedback I got. A few musicians also post on A'gon, I love those posts.
Some months back, we listened to the 005 on few tracks at his lab but I want to have him listen for a month or so and get his professional opinion. He is lending me a new hot item (hopefully for a month, which I will likely buy). He had some issue with the 005 on first listen (forgot the details), but the main take away was that he wanted to spend more time with it since it seemed like an excellent DAC.
I will post his take in a month. Either way I love the 005. Though it is not my fav on my new 7 tube headphone amp. I love the Benchmark DAC3B on this new tube amp.