@brbrock
Hello. I purchased most of the Mojo Audio DACs I have owned new, except for the two I have now. The EVO Pro, I purchased from a reviewer and I don't believe either of us knew it had Z-chips in it. My more recent purchase of the X SE NC Z DAC was from the original owner.
The comparison has been interesting and ended a little different than what I expected it would. I do have a write-up but need to find time to go through it and then will post, hopefully by this weekend.
Before I found the most recent X SE etc. DAC, I too contacted Benjamin and learned he was out of the Z-chips, so I had decided to wait and use my EVO Pro, until he developed something new (rumors of a DAC with BB PCM chips, maybe in 2025?). However, when I saw the X SE DAC for sale with nano-crystal chokes and Z-chips, I didn't pass it up.
As a short summary, I believe the X SE I have here is an improvement on the regular X SE that I owned previously. Unfortunately, I cannot say whether the improvement is because of the Z-chips or the nano-crystal chokes, since it has both.