How are zipper worms different?

http://www.calfishing.com/gallery/v/members/JohnmcNerney/DSCF1567.JPG.html?

At some point it appears to be OK to copy another design, and as far as the Triple Trout goes, that horse left the barn a couple years ago.

On the bright side, I doubt Alan's bait is going to put a dent in Triple Trout sales. People are smart enough to pay for quality baits :)