I've been thinking about USB vs. optical...
When I first got my Hugo 2 optical wasn't really an option for me because my motherboard had no optical out but I built a new PC in July last year with a Z390 AORUS Pro motherboard... which does have an optical out. It seems to me (based on this thread only) that optical is the better choice and at best you are trying to match USB with optical and in my continuing quest for the best source I've spent the morning looking into optical cables and reading through this thread's many discussions on the topic.
Fast forward a few hours and I've ordered the QED Reference Quartz optical cable.
Using an old, cheap optical and DirectSound I seem to be getting pops/clicks, but do not with USB (driverless). Of course, this is solved when using Audirvana and WASAPI so my plan is to have both cables plugged in and swap between them. USB for Discord, gaming, YouTube etc and optical for listening sessions. It's actually a bit more convenient believe it or not: when I use WASAPI with USB I need to restart Chrome in order to watch videos, but with these being two distinct devices within Windows I can swap between them and an application exclusively controlling the Hugo 2 seamlessly.
Looking forward to getting the QED cable!