It's like everything else. There are trade-offs. Open eye siwashes are easiest to put on. The octopuss has the offset. That said, I use Gama open eye siwashes on all spinners I build. They are designed for that use. The octopuss eye is also small and tends to just ride in the narrow spot on a split ring. The siwash is more free to move. They should sized to the spinner. Try both and see what you like best.