Well, two-days is not much time to get anything comprehensive but the Spring 3 is a great sounding DAC, so far.
I too had a Qutest for 4 or so years. I really liked it. But I wanted to move up to the next level. There were 4 or 5 choices that appealed to me, and my two finalists were the Spring 3 and the Hugo TT2. I had not personally heard either DAC.
I chose the Chord because of my affinity for the Qutest. And, it was a good choice. It expanded on the Chord house sound with a higher resolving DAC. I've had it about a year. I felt I could not go wrong with the Hugo TT2 and I was correct.
But as systems evolve you try different things and find different strengths and weaknesses. I purchased an Audiowise SRC-DX USB to Dual S/PDIF converter and used it with my Hugo TT2. What I found was that I liked the S/DIF input better than the USB input on the Chord. But using a "converter" bothered me. I preferred the sound with the converter but I don't like using a USB powered box to convert USB to S/PDIF.
I looked at changing my SoTM network streamer to get outputs other than the lone USB output on the SMS200 Ultra Neo. But after reading more and more comments from Spring 3 owners about how great it was turned my attention to that DAC and it's very broad input options.
OK, how's it sound? It's not a shocking R2R sound all that different from the Chord FPGA sound, but it is a bit less aggressive? It is clean, clear and precise very detailed and the edges of clicks, drums, piano keys are more etched. It handles reverb decay much more naturally. These are not huge changes. If you love your Qutest you'll love the Spring 3, as well.