I agree pattern both.
I will say that ducks that are hit with black cloud, which I have used for the last 2 yrs, are hit better with black cloud. Not that you will hit more ducks, but the ones you hit will be hurt more, at least in my experience. They seem to penetrate better and cause more damage based on cleaning ducks shot with and without black cloud.
A buddy I hunt with tried them last yr and won't go back, nor will I. He seconded my experience - what used to be a swimmer is now essentially flopping around in the water. We hunt in flooded corn, so swimmers get away quickly, even with dogs b/c the pond is a few acres. If you hunt open water it may be less critical.
I use a black cloud choke - maybe a mktg gimmick, but since the wad works very differently, I wanted to give it a shot. The choke helps the wad deploy better, so the story goes...maybe that was a gimmick, maybe black cloud is a gimmick, but in my experience it works better than the Kent round #2's I was using.