Less premature rejection from Imp Clips - the hook is held a little more securely. However, if you are using elastic thread on your bait make sure it is "tidy" with no loose ends or loops hanging down to catch on the clip which can prevent the bait being released on splash down.
Imp clips are hard to put together being tough on soft fingers but well worth the effort.
I have also used the Gemini Slash down clips with thin hooks like Varivas "big mouth" but they really are too small for most of the hooks that I use.