I think the photo with no dust in the vac was taken after only a brief test of the cyclone unit. I didn't try it, but I suspect that my vac would also see no dust there if I just made some cuts with the Kapex and the DD2.5. What I'd like to see is some test done with the dust, some nuts as well as a flow meter in a more formal comparison.
By the way, I paid $60US for the DD2.5, which is same price as the Quick Snap.