I've used the one on the right for several years. It works fine as long as the line is relatively fresh.

However, I just switched back over to 'ol faithful to get back to a simple setup (that doesn't beat the snot out of our daggerboards when raised). A double wire dog bone (with a high and low position) tied to a simple line through the cable end-eye, a Hobie bowsie stopper, and a bunji tied straight to the line.