How easily can you distinguish between different DACs?

I can sympathize with this question, as well as the various responses.  Because I was unable to distinguish in double-blind listening over a couple of weeks a Weiss 502 from the DA2 built into my C2700, I sent the Weiss back (shout out to The Music Room for being super easy to work with) and instead went back to the source for improvement, adding an Aurender N200 to my system (replacing my PC running Roon as digital streamer/server).  I believe this will allow easier distinguishing of DAC quality, as the rest of my system would be judged as "reasonable" by most (MC462, C2700, B&W 802D4).

One more thing - I think double-blind tests are interesting and certainly good data to have as you make a judgement about how new gear sounds (or doesn't) to YOU (even you capricious folks out there LOL) - but long-term listening in a relaxed (not analytical) state is the real tell for me.  After all, listening in that state is where most of us want to experience magic.

@audiowebe  Yes - the N200 made an audible difference, a little cleaner, a little more solid.  Particular improvement in Hi-Res (with regard to sampling rate) content for some reason. I also noticed a big jump in the playback quality of my ripped CDs - best I have ever heard them, and I did own the last of the top-end OPPO players.  The minor downside to the Aurender for me has been the UI.  It is not as feature rich as Roon and does not offer a PC-based platform.  That said, the UI (Conductor) is super-reliable and supported by real people who actually respond to your questions promptly - you are never lost in a crowd-sourced feedback morass.  There is talk of Aurender being a Roon endpoint soon, but I do not know how much of the Aurender sound quality advantage will be lost by operating in that mode.  Sorry - I went off for a while there. 

One more point to add about the Aurender N200 as a source and what it brings to the table (I assume most mid-high and above server streamers would do the same to a similar extent).  In my response above I said "a little cleaner, a little more solid" and I'd forgotten about the subtle but very satisfying sound layer reveals that have come with the N200 replacing my PC running Roon.  A good example is the Local Hero Soundtrack (Mark Knopfler).  The very first track - The Rocks and the Water - used to be somewhat of a throwaway for me - but with the Aurender the sonic subtleties coming from the various blended synth effects is like listening to the quiet in nature - at first you hear nothing, then the sounds build in and around each other.  This is an extreme example - I am not trying to say it makes all music sound stupendous - but it certainly reveals subtleties in a very pleasing way.