Thanks for reaching out!
You've chosen two really good sleeping bags! Based on what you've told us, it sounds like the real decision comes down to weight, warmth, and size vs comfort (no down feathers poking out) and not being concerned with the insulation getting wet. While synthetic insulation has made some vast improvements in recent years, down is warmer for its weight and packs down smaller than synthetic fibers.
While you are correct that if down gets wet it 'clumps' up and loses its insulation value, the down in the NEMO Disco is treated with a durable water repellant (DWR) to help it shed moisture and stay lofted. I have been using down sleeping bags for a long time and have never experienced being poked by the down feathers (definitely with down jackets though!) and the reviews of the Disco are almost all positive and do not mention that issue.
All of that being said, if you want the warmest bag at the lightest weight possible, the down bag is the way to go. That is particularly true if you're concerned about the size, as over 2 liters of difference in volume between the two is pretty significant. If you have extra room in your pack it may not matter that much, but if you're using a smaller backpack that could be an issue.
We hope you were able to try them out in person and maybe even pack them into their compression sacks for a side-by-side size comparison.
Hopefully this helps, thanks!