I use both, I was confused about which was which, I had trouble getting the anchor to lift initially, perhaps the bouy was too small or something, what I did was to attach the snap-clip to the bouy with about 6ft of rope, this seemed to increase the drag on the bouy & it works ok now.
I found that leaving it attached to the anchor warp ended up with it bumping against the bow all the time, that got right up my nose that did!
blueskip