The Bank Sinker is special because the tear drop shape makes it perfect for long distance casting and great for not being caught on a rocky bottom. But the down side to using the Bank Sinker is that it usually doesn’t sit in place in a strong current. These sinkers have a tendency to roll on the bottom.
The Pyramid Sinker is mostly used for weighting a rig for a sandy bottom. This weight cast just as good as a Bank Sinker, but if the area you are fishing has a rocky bottom, you will lose your weight and rig every time. The sharp points to the Pyramid Sinker will easily grab on to a rock and not let go. But, when used for beach fishing this sinker stick and embeds perfectly into the sand.