Similar concept, The Jika is a little more free to move because the link between weight and hook is more open. Thus I feel it presents better with more action. The long weight folds back as it moves along and does not dig in allowing it to be moved faster with less snags and less bottom disturbance. Making up your own permits you more opportunity to match components to the bait used and conditions you are fishing. And using round bend snaps makes quick changes without retying easy.