The weight IMHO is the most important aspect of anchoring. I put down my CQR and have dove many times even after a squall blows throught and the anchor is just sitting there. The anchor plus chain is often 300 lbs on the bottom and with a 30 or 40 kt squall I often don't get any pull on the anchor. The silly anchor test often use recommend anchors that the manufacture suggests and then they're comparing a 50# ABC to a 20# DEF. Not very scientific, unless they're testing the manufactures recommendations. But the mislead us and then make an anchor comparison. And the Rocna video is even worse. Granted it's their "advertising" but they drop the Rocna in a muddy marl mixture and pull and the other anchors in hard pack!

The key to me about both the Delta, and CQR and Spade is that when they burry they'll go all the way to China. Had a good friend that sat through Ivan in Grenada with CQR's and he had to have a diver come dig them out. They were down about 5' the diver said. Rocna's and Supremes (although I'm sure fine anchors) wedge the surface material into their hoop and the hold on to a piece of earth.

Unfortunately; I have a bow sprit or I would have most likely a Supreme. I keep looking at how I would hang it there. I love anchors and the right anchor for the right bottm lets me sleep well.

Go Slow
Sail Far
Stay Long