I have conducted some very quick and dirty (and unscientific) tests on the Double Dragon.
Cyclic loading (which some call 'slack shaking' on this site) will compromise the core (nub) of this structure relatively quickly - unless - it is drawn up and vigorously cinched tight.
In direct comparison, the [Yosemite] Bowline did not require such strict attention to cinch down and compress the core (nub) - it was more resistant to cyclic loading.
This 'testing' was carried out with 8.0mm diameter Sterling USA cord (human rated 17.5kN high strength - my favourite brand of cordage).
Obviously, a lot more testing needs to be done!
Mark