I've never used the Isreali blade but from what others are writing here it seems as though it's a mild blade. Shark is middle of the road in terms of sharpness. If Shark was better, that may be a hint that's telling you that you need at least a medium sharp blade, maybe more. Try Astra, BiC, and Kai. These are all blades on the sharper side. I personally prefer Kai over all others. It's sharp as a laser without the harshness I feel from Feather. You need to experiment but watch for the signs too.