I have been using Senkos for about 2 years now. I just started also trying the Tiki Stiks and the Strike Zero's.
From what I can tell the Tiki Sticks are pretty good, they have almost the same action as the Senko 5" reg model. But they do not have the amount of salt as the Senko which I thinks make a difference in bass holding on longer and maybe the action. As far as the Zero the jury is still out.. so far I am not to pleased with the action, they sink allot slower, but I guess time will tell, If I catch fish on them, they for sure will have their place in my weapon arsinal.